This page has only limited features, please log in for full access.
Accurate estimation of mangrove leaf area index (LAI) is fundamental for effective mangrove ecosystem management and protection. Remote sensing technology has showed its powerful potential in accurately retrieving mangrove LAI. The generic estimation model combining vegetation indices (VIs) with physically-based law, simplified as LAI-VIs model, has successfully estimated crop LAI. However, the capacity of estimating mangrove LAI using this model, so far, is unclear. Moreover, some studies have proved that estimation accuracy of terrestrial forests and crops LAI can be ameliorated with VIs based on red-edge band (VIs_RE) because of less affecting by canopy structure. However, little literature explores the ability of VIs_RE, especially, from different multispectral sensors, for estimating mangrove LAI. Therefore, our main purpose is to evaluate the robustness and sensitivity of the LAI-VIs_RE model from Sentinel-2, WorldView-2 (WV-2) and Unmanned Aerial Vehicle (UAV) multispectral imagery for estimating mangrove LAI. The estimation models with input variables of NDVI, NDVI_RE1 (band combination from red-edge and visible band), NDVI_RE2 (band combination from red-edge and near-infrared reflectance) from three types of multispectral imagery are used to calculate mangrove LAI of 99 plots. The results showed that the WV-2 imagery acquires the best estimation accuracy (R2 = 0.72, RMSE = 0.414), followed by Sentinel-2 imagery (R2 = 0.68, RMSE = 0.440), and UAV multispectral imagery (R2 = 0.48, RMSE = 0.570). The analyses display the good results of the LAI-NDVI model and LAI-NDVI_RE1 model from WV-2 and Sentinel-2 imagery with the range of R2 from 0.57 to 0.72, and the discrepant consequences of LAI-NDVI_RE2 model from UAV imagery with R2 of 0.15, WV-2 imagery with R2 of 0.67 and Sentienl-2 imagery with R2 of 0.65, 0.18 and 0.12. This study proves that the generic estimation model and NDVI_RE1 derived from WV-2 and Sentinel-2 multispectral imagery could be deemed as a basic method and input variables of mapping mangrove LAI.
Xianxian Guo; Mao Wang; Mingming Jia; Wenqing Wang. Estimating mangrove leaf area index based on red-edge vegetation indices: A comparison among UAV, WorldView-2 and Sentinel-2 imagery. International Journal of Applied Earth Observation and Geoinformation 2021, 103, 102493 .
AMA StyleXianxian Guo, Mao Wang, Mingming Jia, Wenqing Wang. Estimating mangrove leaf area index based on red-edge vegetation indices: A comparison among UAV, WorldView-2 and Sentinel-2 imagery. International Journal of Applied Earth Observation and Geoinformation. 2021; 103 ():102493.
Chicago/Turabian StyleXianxian Guo; Mao Wang; Mingming Jia; Wenqing Wang. 2021. "Estimating mangrove leaf area index based on red-edge vegetation indices: A comparison among UAV, WorldView-2 and Sentinel-2 imagery." International Journal of Applied Earth Observation and Geoinformation 103, no. : 102493.
Soil communities are impacted by increasingly frequent and intense climate extremes. To accurately predict the effects of these events on soil communities and effectively design recovery and management programs for soil biodiversity, it is necessary to understand the spatiotemporal patterns and mechanisms underlying the soil community responses. Here, we investigated a mangrove soil macrofaunal (mollusk) community before and after an extreme cold event (ECE) to determine the effects of the ECE on the spatial pattern, temporal succession, and deterministic and stochastic processes affecting the soil metacommunity. We used distance-decay and time-decay analyses to characterize the spatial pattern and temporal succession of soil mollusk community dissimilarity (e.g., species identity, abundance, and biomass) across a reginal scale (~350 km scale). We used null models to compare the relative importance of deterministic and stochastic processes in shaping the regional soil mollusk community assembly. The ECE resulted in a reorganization of the soil mollusk metacommunity reflected by the mortality and extinction of several original species, colonization by new opportunistic species, and a significant reduction in mollusk abundance and biomass. The ECE increased divergent temporal succession but decreased spatial segregation in the soil mollusks, consistent with changes in the community dissimilarity of species abundance, richness, and biomass. The ECE increased the numbers of non-random segregated and random structures of soil mollusks while decreased the number of non-random aggregated communities. Notably, non-random segregated communities were the most strongly affected. Thus, the response of the soil mollusk metacommunity to the ECE was mediated by an increase in limiting similarity processes and stochastic processes and a decrease in limiting dissimilarity processes. The dominant limiting similarity processes involved species competition and/or dispersal limitation. More broadly, our study indicated that alterations in the spatiotemporal dynamics of soil fauna in response to climate change should be studied at the metacommunity scale. These spatiotemporal dynamics should be further tested in an ecological processes framework to reliably evaluate soil community responses to climate change and to devise management strategies for global soils.
Guogui Chen; Xuan Gu; Yi Liu; Wenqing Wang; Mao Wang. Responses of a soil mollusk community to an extreme cold event. Applied Soil Ecology 2021, 167, 104067 .
AMA StyleGuogui Chen, Xuan Gu, Yi Liu, Wenqing Wang, Mao Wang. Responses of a soil mollusk community to an extreme cold event. Applied Soil Ecology. 2021; 167 ():104067.
Chicago/Turabian StyleGuogui Chen; Xuan Gu; Yi Liu; Wenqing Wang; Mao Wang. 2021. "Responses of a soil mollusk community to an extreme cold event." Applied Soil Ecology 167, no. : 104067.
Climate change is expected to increase the magnitude and frequency of extreme climate events. Accurate predictions of the effects of these events on communities and designing scientific recovery and management programs for biodiversity require an understanding of the mechanisms underlying differentially-abundant taxa responses. Here, we assessed an arboreal mangrove mollusk community before and after an extreme cold event (ECE) to determine the effects of the ECE on deterministic and stochastic processes, as well as succession, in abundant and rare taxa. We found that the ECE caused increasingly divergent succession of mollusks, as reflected by changes in species richness and species turnover; these changes more strongly affected the abundant taxa than the rare taxa. The relative importance of stochastic and deterministic processes in shaping mollusk communities was also altered after the ECE, although the effects differed between the abundant and rare species assemblages. That is, in response to the ECE, the abundant assemblage maintained a consistent level of mutualism while significantly increasing divergent succession by reducing ecological drift, decreasing niche breadths, weakening interspecific competition, promoting environmental selection, and increasing dispersal limitations. In contrast, the rare assemblage maintained high levels of divergent succession by increasing ecological drift, improving environmental filtering, decreasing niche breadths, weakening both interspecific competition and mutualism, and eroding spatial limits. Thus, species richness, species turnover, abundant species, and rare taxa should be the recommended indicators for the ECE; deterministic and stochastic processes should be mechanistic indexes for community coping with the ECE and also be theoretical indicators for biodiversity conservation and restoration after the ECE. More broadly, our results highlight that mechanistic indexes (deterministic and stochastic processes) and community structure indicators (species richness and species turnover) should be considered in differently-abundant taxa (abundant and rare taxa) in order to more accurately predict the effects of climate change on communities and devise targeted management and conservation strategies for the world's biodiversity.
Guogui Chen; Wenqing Wang; Yamian Zhang; Yi Liu; Xuan Gu; Xiaofang Shi; Mao Wang. Abundant and rare species may invoke different assembly processes in response to climate extremes: Implications for biodiversity conservation. Ecological Indicators 2020, 117, 106716 .
AMA StyleGuogui Chen, Wenqing Wang, Yamian Zhang, Yi Liu, Xuan Gu, Xiaofang Shi, Mao Wang. Abundant and rare species may invoke different assembly processes in response to climate extremes: Implications for biodiversity conservation. Ecological Indicators. 2020; 117 ():106716.
Chicago/Turabian StyleGuogui Chen; Wenqing Wang; Yamian Zhang; Yi Liu; Xuan Gu; Xiaofang Shi; Mao Wang. 2020. "Abundant and rare species may invoke different assembly processes in response to climate extremes: Implications for biodiversity conservation." Ecological Indicators 117, no. : 106716.
In the context of sea‐level rise (SLR), an understanding of the spatial distributions of mangrove flora and fauna is required for effective ecosystem management and conservation. These distributions are greatly affected by tidal inundation, and surface elevation is a reliable quantitative indicator of the effects of tidal inundation. Most recent studies have focused exclusively on the quantitative relationships between mangrove‐plant zonation and surface elevation, neglecting mangrove fauna. Here, we measured surface elevation along six transects through the mangrove forests of a subtropical estuarine wetland in Zhenzhu Bay (Guangxi, China), using a real‐time kinematic global positioning system. We identified the mangrove plants along each transect and investigated the spatial distributions of arboreal, epifaunal, and infaunal molluscs, as well as infaunal crabs, using traditional quadrats. Our results indicated that almost all mangrove forests in the bay were distributed within the 400–750 m intertidal zone, between the local mean sea level and mean high water (119 cm above mean sea level). Mangrove plants exhibited obvious zonation patterns, and different species tended to inhabit different niches along the elevation gradient: Aegiceras corniculatum dominated in seaward locations while Lumnitzera racemosa dominated in landward areas. Mangrove molluscs also showed distinct patterns of spatial zonation related to surface elevation, independent of life‐form and season. The spatial distributions of some molluscs were correlated to the relative abundances of certain mangrove plants. In contrast, the spatial distributions of crabs were not related to surface elevation. To the best of our knowledge, this is the first study to explicitly quantify the influences of surface elevation on the spatial distributions of mangrove fauna. This characterization of the vertical ranges of various flora and fauna in mangrove forests provides a basic framework for future studies aimed at predicting changes in the structure and functions of mangrove forests in response to SLR.
Wei Ma; Wenqing Wang; Chaoyi Tang; Guogui Chen; Mao Wang. Zonation of mangrove flora and fauna in a subtropical estuarine wetland based on surface elevation. Ecology and Evolution 2020, 10, 7404 -7418.
AMA StyleWei Ma, Wenqing Wang, Chaoyi Tang, Guogui Chen, Mao Wang. Zonation of mangrove flora and fauna in a subtropical estuarine wetland based on surface elevation. Ecology and Evolution. 2020; 10 (14):7404-7418.
Chicago/Turabian StyleWei Ma; Wenqing Wang; Chaoyi Tang; Guogui Chen; Mao Wang. 2020. "Zonation of mangrove flora and fauna in a subtropical estuarine wetland based on surface elevation." Ecology and Evolution 10, no. 14: 7404-7418.
Salinity is a vital factor that regulates leaf photosynthesis and growth of mangroves, and it frequently undergoes large seasonal and daily fluctuations creating a range of environments —oligohaline to hyperhaline. Here, we examined the hypotheses that mangroves benefit opportunistically from low salinity resulting from daily fluctuations and as such, mangroves under daily fluctuating salinity grow better than those under constant salinity conditions. We compared growth, salt accumulation, gas exchange, and chlorophyll fluorescence of leaves of mangrove Bruguiera gymnorhiza seedlings growing in freshwater (FW), constant salinity (CS, 15 practical salinity units, PSU), and daily fluctuating salinity (FS, 0–30 PSU, average of 4.8 PSU) conditions. The traits of FS‐treated leaves were measured in seedlings under 15 PSU. FS‐treated seedlings had greater leaf biomass than those in other treatment groups. Moreover, leaf photosynthetic rate, capacity to regulate photoelectron uptake/transfer, and leaf succulence were significantly higher in FS than in CS treatment. However, leaf water‐use efficiency showed the opposite trend. In addition to higher concentrations of Na+ and Cl‐, FS‐treated leaves accumulated more Ca2+ and K+. We concluded that daily fluctuating salinity can enhance water absorption, photosynthesis, and growth of leaves, as well as alter plant biomass allocation patterns, thereby positively affecting B. gymnorhiza. Mangroves that experience daily fluctuating salinity may increase their adaptability by reducing salt buildup and water deficits when their roots are temporally subjected to low salinity or freshwater and by absorbing sufficient amounts of Na+ and Cl‐ for osmotic adjustment when their roots are subsequently exposed to saline water. This article is protected by copyright. All rights reserved.
Wenqing Wang; Li Xu; Siyang You; Chao Liu; Mao Wang. Daily salinity fluctuation alleviates salt stress on seedlings of the mangrove Bruguiera gymnorhiza. Hydrological Processes 2020, 1 .
AMA StyleWenqing Wang, Li Xu, Siyang You, Chao Liu, Mao Wang. Daily salinity fluctuation alleviates salt stress on seedlings of the mangrove Bruguiera gymnorhiza. Hydrological Processes. 2020; ():1.
Chicago/Turabian StyleWenqing Wang; Li Xu; Siyang You; Chao Liu; Mao Wang. 2020. "Daily salinity fluctuation alleviates salt stress on seedlings of the mangrove Bruguiera gymnorhiza." Hydrological Processes , no. : 1.
China has lost about 50% of its mangrove forests from 1950 to 2001. Since 2001, mangrove forest area has increased by 1.8% per year due to strict protection of the remaining mangrove forests and large-scale restoration. By 2019, 67% of the mangrove forests in China had been enclosed within protected areas (PAs). In terms of the proportion of PAs of mangrove forests, China has achieved the conservation target of “Nature Needs Half”. The ongoing degradation of mangrove forests was assessed at the species, population, community and ecosystem levels. The results show that despite the strict protection, the remaining mangrove forests are suffering extensive degradation due to widespread anthropogenic disturbance. Of the 26 mangrove species, 50% are threatened with extinction, a proportion higher than the average for all higher plants in China (10.8%). Local extinction of some common species like Bruguiera gymnorhiza is widespread. About 53% of the existing mangrove areas were dominated by low-intertidal pioneer species. Consequently, the carbon stock in vegetation has decreased by 53.1%, from 21.8 Tg C in the 1950s to 10.2 Tg C in 2019. Meanwhile, there is an estimated 10.8% concomitant decrease in the carbon sequestration rate. The root cause for this degradation in China is seawall construction because most mangroves are outside seawalls in China. Without fundamental changes in protection and restoration strategies, mangrove forests in China will continue to degrade in spite of strict protection and large-scale restoration. Future mangrove conservation effort should aim to preserve the diversity of both the biota and the ecological processes sustaining the mangrove ecosystem. A few suggestions to raise the effectiveness of mangrove conservation actions were provided.
Wenqing Wang; Haifeng Fu; Shing Yip Lee; Hangqing Fan; Mao Wang. Can Strict Protection Stop the Decline of Mangrove Ecosystems in China? From Rapid Destruction to Rampant Degradation. Forests 2020, 11, 55 .
AMA StyleWenqing Wang, Haifeng Fu, Shing Yip Lee, Hangqing Fan, Mao Wang. Can Strict Protection Stop the Decline of Mangrove Ecosystems in China? From Rapid Destruction to Rampant Degradation. Forests. 2020; 11 (1):55.
Chicago/Turabian StyleWenqing Wang; Haifeng Fu; Shing Yip Lee; Hangqing Fan; Mao Wang. 2020. "Can Strict Protection Stop the Decline of Mangrove Ecosystems in China? From Rapid Destruction to Rampant Degradation." Forests 11, no. 1: 55.
Determining the relative importance of ecological processes regulating the biogeographic patterns of marine species, especially with respect to α- and β-diversity in multi-habitat communities, is a central goal in marine ecology. We explored the relative contribution of spatial (stochastic processes) and environmental factors (deterministic processes) to the biogeographic patterns of the α- and β-diversity of mangrove mollusks. A total of 16 mangrove areas were sampled in southeast coast China from 18°N to 28°N latitude. The highest mean α-diversity was found at 20°N and that of β-diversity was at 21°N. Both spatial and environmental factors had significant effects on the α- and β-diversity patterns. The environments had greater effects than the spaces on shaping the α-diversity pattern, while the spaces were relatively more important in governing the β-diversity patterns than the environments. Our results suggest that the α-diversity pattern was mainly controlled by deterministic processes (environmental filtering), while β-diversity was primarily shaped by stochastic processes (dispersal-related), although both processes had significant impacts on α- and β-diversity patterns. Identifying the ecological variables and mechanisms that drive variations in α- and β-diversity may help guide the conservation for biodiversity in endangered mangrove ecosystems under anthropogenic and global changes.
Guogui Chen; Wenqing Wang; Yi Liu; Yamian Zhang; Wei Ma; Kun Xin; Mao Wang. Uncovering the relative influences of space and environment in shaping the biogeographic patterns of mangrove mollusk diversity. ICES Journal of Marine Science 2019, 77, 30 -39.
AMA StyleGuogui Chen, Wenqing Wang, Yi Liu, Yamian Zhang, Wei Ma, Kun Xin, Mao Wang. Uncovering the relative influences of space and environment in shaping the biogeographic patterns of mangrove mollusk diversity. ICES Journal of Marine Science. 2019; 77 (1):30-39.
Chicago/Turabian StyleGuogui Chen; Wenqing Wang; Yi Liu; Yamian Zhang; Wei Ma; Kun Xin; Mao Wang. 2019. "Uncovering the relative influences of space and environment in shaping the biogeographic patterns of mangrove mollusk diversity." ICES Journal of Marine Science 77, no. 1: 30-39.
Mangrove structural complexity plays an important role in the way fish using their habitat. However, the effects of structural attributes on fish spatial distribution remain uncertain. In this study, we sampled fish at three easily identifiable microhabitats (i.e., vegetated area with both mangrove trees and pneumatophores, pneumatophore area without trees, and adjacent mudflat without trees and pneumatophores) within two sites dominated by Avicennia marina and Sonneratia apetala in a large estuarine system in South China from 2014 to 2015, and explored the fish community differences in these microhabitats. Our results showed that fish assemblages varied significantly among the three microhabitats, with distinct community assembly patterns between sites. At the Avicennia site, highest fish diversity was recorded at the mudflat, followed by the pneumatophore area and the vegetated area. In contrast, the opposite pattern was observed at the Sonneratia site. Fish size also differed significantly among microhabitats, with smaller fish presented in the vegetated areas. Within the same mangrove types, the height and biomass of pneumatophores as well as density of trees showed significant effects on the among‐microhabitat variations of fish assemblages. Fish abundance was positively associated with pneumatophore height and negatively correlated with pneumatophore biomass at the Avicennia site. While at the Sonneratia site, it was positively correlated with pneumatophore biomass. We conclude that the spatial variations of fish community are highly correlated with the structural complexity of mangroves. However, the specific effects might be mangrove species‐dependent.
Yamian Zhang; Yipeng Ding; Wenqing Wang; Yuanxi Li; Mao Wang. Distribution of fish among Avicennia and Sonneratia microhabitats in a tropical mangrove ecosystem in South China. Ecosphere 2019, 10, 1 .
AMA StyleYamian Zhang, Yipeng Ding, Wenqing Wang, Yuanxi Li, Mao Wang. Distribution of fish among Avicennia and Sonneratia microhabitats in a tropical mangrove ecosystem in South China. Ecosphere. 2019; 10 (6):1.
Chicago/Turabian StyleYamian Zhang; Yipeng Ding; Wenqing Wang; Yuanxi Li; Mao Wang. 2019. "Distribution of fish among Avicennia and Sonneratia microhabitats in a tropical mangrove ecosystem in South China." Ecosphere 10, no. 6: 1.
Searching for a sustainable use pattern of mangrove resources is a premise of mangrove conservation in developing countries. In China, uncontrolled domestic duck farming has caused significant damage to mangrove forests and triggered discussions about the conservation and utilization of mangrove forests. This study investigated the effects of three different domestic duck farming patterns (intensive, semi-intensive and quasi-ecological farming patterns) on mangrove ecosystems in southern China to find a farming pattern where mangrove conservation and utilization can coexist. The results showed that domestic duck farming could bring remarkable economic profits for farmers; the return on investment of the quasi-ecological farming pattern is the highest, whereas different farming patterns caused distinct influences on mangrove forests. Intensive and semi-intensive farming patterns significantly destroyed mangrove plants and reduced macrobenthos' biodiversity. In contrast, the quasi-ecological farming pattern had a negligible influence on mangrove forests. Quasi-ecological farming achieved a good balance between the conservation and utilization of mangrove forest resources, making it sustainable. Therefore, controllable domestic duck farming in mangrove forests deserves to be advocated, especially in the areas where ecotourism cannot be carried out. Further study is needed on how to determine the duck farming capacity.
Xinghai Ao; Wenqing Wang; Wei Ma; Xueqin Gao; Mao Wang. Domestic duck (Anas platyrhynchos) farming in mangrove forests in southern China: Unsustainable and sustainable patterns. Ocean & Coastal Management 2019, 175, 136 -143.
AMA StyleXinghai Ao, Wenqing Wang, Wei Ma, Xueqin Gao, Mao Wang. Domestic duck (Anas platyrhynchos) farming in mangrove forests in southern China: Unsustainable and sustainable patterns. Ocean & Coastal Management. 2019; 175 ():136-143.
Chicago/Turabian StyleXinghai Ao; Wenqing Wang; Wei Ma; Xueqin Gao; Mao Wang. 2019. "Domestic duck (Anas platyrhynchos) farming in mangrove forests in southern China: Unsustainable and sustainable patterns." Ocean & Coastal Management 175, no. : 136-143.
Mangrove forest responses to sea-level rise (SLR) are likely misestimated in many studies because current assessment methods often assume a constant rate of surface elevation change along the intertidal profile. Most studies also neglect the ecogeomorphic feedback process known to accelerate soil building with SLR. Here, an empirical, dynamic model that accounts for the above processes is constructed for the intertidal zone of a mangrove bay in Hainan, China. The model allows us to explore the response of a tide-dominated mangrove forest to different rates of SLR. Rod surface elevation table-marker horizon (RSET-MH) data (2015–2018) indicate rather high rates of surface accretion (13.3–57.9 mm yr−1) and surface elevation changes (7.9–35.5 mm yr−1). Surface accretion and surface elevation change decreased exponentially with increasing ground elevation. Our model showed that SLR (at rates of 4 and 16 mm yr−1) would not lead to the loss of mangrove cover but that it could alter mangrove species zonation along the intertidal profile by 2100 due to a rich sediment supply and ecogeomorphic feedback. Importantly, rapid SLR and landward barriers can pose a considerable threat to the high-intertidal community by causing increased inundation of the high-intertidal zone, subsequent shifts in species zones, and the loss of mangrove biological and structural diversity along the intertidal profile. Overall, this study predicts probabilities of habitat suitability for mangrove species under SLR and expands our current understanding of the impacts of SLR on tide-dominated mangrove forests in sediment-rich systems. Incorporation of extensive, long-term RSET data into this kind of dynamic model could contribute to the better prediction of mangrove responses to SLR at large scales in the future.
Haifeng Fu; Yamian Zhang; Xinghai Ao; Wenqing Wang; Mao Wang. High surface elevation gains and prediction of mangrove responses to sea-level rise based on dynamic surface elevation changes at Dongzhaigang Bay, China. Geomorphology 2019, 334, 194 -202.
AMA StyleHaifeng Fu, Yamian Zhang, Xinghai Ao, Wenqing Wang, Mao Wang. High surface elevation gains and prediction of mangrove responses to sea-level rise based on dynamic surface elevation changes at Dongzhaigang Bay, China. Geomorphology. 2019; 334 ():194-202.
Chicago/Turabian StyleHaifeng Fu; Yamian Zhang; Xinghai Ao; Wenqing Wang; Mao Wang. 2019. "High surface elevation gains and prediction of mangrove responses to sea-level rise based on dynamic surface elevation changes at Dongzhaigang Bay, China." Geomorphology 334, no. : 194-202.
Propagule dispersal has generally been recognized as a vital factor affecting the spatial structure of tropical forest plants. However, available research shows that this hypothesis does not apply to mangrove species the propagules of which are dispersed by water. Due to the lack of comprehensive and quantitative information as well as the high spatio-temporal heterogeneity of the mangrove environment, the exact factors affecting the spatial structure of mangrove forests are poorly understood. To assess this, we selected a mangrove estuary with high mangrove species richness that experiences great changes in water salinity. After investigating the zonation of mature mangrove individuals across tides and the estuary, we measured the size and initial specific gravity of the propagules and then selected the eight most common species from which to observe the changes in specific gravity, buoyancy, and root initiation during dispersal at different sites with different water salinity regimes. The relationships among distribution patterns, propagule establishment, and dispersal behavior were investigated. We found that mangrove propagule dispersal is not a passively buoyant process controlled by water currents. During dispersal, mangrove propagules can actively adjust their specific gravity and root initiation. The dynamic specific gravity of the propagules was negatively related to propagule buoyancy and surface elevation. The differences in propagule specific gravity corroborated the distribution patterns of the species across the intertidal zone and estuary. Mangrove zonation on both the intertidal and estuarine scale can be explained by the tidal sorting hypothesis, as zonation is controlled by the tidal sorting of the propagules according to buoyancy and by the differential ability of the propagules to establish in the intertidal zones. The results add new understanding of observed mangrove species zonation and should inform conservation managers when restoring mangroves or evaluating the potential impacts of global change and anthropogenic disturbances that might alter the hydrology, including the water salinity regime.
Wenqing Wang; Xiaofei Li; Mao Wang. Propagule Dispersal Determines Mangrove Zonation at Intertidal and Estuarine Scales. Forests 2019, 10, 245 .
AMA StyleWenqing Wang, Xiaofei Li, Mao Wang. Propagule Dispersal Determines Mangrove Zonation at Intertidal and Estuarine Scales. Forests. 2019; 10 (3):245.
Chicago/Turabian StyleWenqing Wang; Xiaofei Li; Mao Wang. 2019. "Propagule Dispersal Determines Mangrove Zonation at Intertidal and Estuarine Scales." Forests 10, no. 3: 245.
A better understanding of surface elevation changes in different mangrove forests would improve our predictions of sea-level rise impacts, not only upon mangrove species distributions in the intertidal zone, but also on the functioning of these wetlands. Here, a two-year (2015–2017) dataset derived from 18 RSET-MH (rod surface elevation table-marker horizon) stations at Dongzhaigang Bay, Hainan, China, was analyzed to investigate how surface elevation changes differed across mangrove species zones. The current SET data indicated a rather high rate (9.6 mm y−1, on average) of surface elevation gain that was mostly consistent with that (8.1 mm y−1, on average) inferred from either the 137Cs or 210Pb dating of sediment cores. In addition, these surface elevation changes were sensitive to elevation in the intertidal zone and differed significantly between the two study sites (Sanjiang and Houpai). Mangrove species inhabiting the lower intertidal zone tended to experience greater surface elevation change at Sanjiang, which agrees with the general view that sedimentation and elevation gains are driven by elevation in the intertidal zone (i.e., greater when positioned lower in the intertidal profile). However, at Houpai, both surface elevation change and surface accretion showed the opposite trend (i.e., greater when positioned higher in the intertidal profile). This study's results indicate that the pattern of surface elevation changes across the intertidal profile maybe inconsistent due to intricate biophysical controls. Therefore, instead of using a constant rate, models should presume a topography that evolves at differing rates of surface elevation change in different species zones across the intertidal profile when predicting the impacts of sea-level rise on mangrove distributions.
Haifeng Fu; Wenqing Wang; Wei Ma; Mao Wang. Differential in surface elevation change across mangrove forests in the intertidal zone. Estuarine, Coastal and Shelf Science 2018, 207, 203 -208.
AMA StyleHaifeng Fu, Wenqing Wang, Wei Ma, Mao Wang. Differential in surface elevation change across mangrove forests in the intertidal zone. Estuarine, Coastal and Shelf Science. 2018; 207 ():203-208.
Chicago/Turabian StyleHaifeng Fu; Wenqing Wang; Wei Ma; Mao Wang. 2018. "Differential in surface elevation change across mangrove forests in the intertidal zone." Estuarine, Coastal and Shelf Science 207, no. : 203-208.
Wei Ma; Mao Wang; Wenqing Wang; Yi Liu; Liuqing Luo; Chaoyi Tang. Biodiversity of mangrove mollusks in the west coast of Hainan Island, China. Biodiversity Science 2018, 26, 707 -716.
AMA StyleWei Ma, Mao Wang, Wenqing Wang, Yi Liu, Liuqing Luo, Chaoyi Tang. Biodiversity of mangrove mollusks in the west coast of Hainan Island, China. Biodiversity Science. 2018; 26 (7):707-716.
Chicago/Turabian StyleWei Ma; Mao Wang; Wenqing Wang; Yi Liu; Liuqing Luo; Chaoyi Tang. 2018. "Biodiversity of mangrove mollusks in the west coast of Hainan Island, China." Biodiversity Science 26, no. 7: 707-716.
Gao, X.; Wang, M.; Wu, H.; Wang, W., and Tu, Z., 2018. Effects of Spartina alterniflora invasion on the diet of mangrove crabs (Parasesarma plicata) in the Zhangjiang Estuary, China. Spartina alterniflora, an exotic invasive plant, has become the most serious threat colonizing mangrove areas in China in the past two decades. The diets of a dominant mangrove crab, Parasesarma plicata, in two mangrove habitats (Kandelia obovata forest and Avicennia marina forest) and adjacent S. alterniflora marsh in a subtropical mangrove estuary in Fujian, China, were investigated using stable isotopes, while a feeding experiment was carried out. The results showed that in the Avicennia forest, Parasesarma was herbivorous, feeding mainly on macroalgae. In the Kandelia forest, the contribution of mangrove leaves, macroalgae, and sediment to the diet of Parasesarma were about 75.5%, 24.2%, and 0.2%, respectively. While Parasesarma had a higher δ13C value and also a higher δ15N value in the Spartina marshes relative to the two mangrove habitats, suggesting that they were feeding on Spartina detritus as well as some small invertebrates. The feeding experiment showed that the δ13C value of Parasesarma after 90-day feeding only on Spartina leaves was very close to the δ13C value of the crab caught from the Spartina marshes, indicating that Spartina was the main carbon source. These results demonstrated that the invasion of Spartina has changed the main food resources of native crabs by providing food resources, which could affect the impact of crabs as ecological engineers and eventually affect the integrity and function of native ecosystems.
Xueqin Gao; Mao Wang; Hao Wu; Wenqing Wang; Zhigang Tu. Effects of Spartina alterniflora Invasion on the Diet of Mangrove Crabs (Parasesarma plicata) in the Zhangjiang Estuary, China. Journal of Coastal Research 2018, 341, 106 -113.
AMA StyleXueqin Gao, Mao Wang, Hao Wu, Wenqing Wang, Zhigang Tu. Effects of Spartina alterniflora Invasion on the Diet of Mangrove Crabs (Parasesarma plicata) in the Zhangjiang Estuary, China. Journal of Coastal Research. 2018; 341 ():106-113.
Chicago/Turabian StyleXueqin Gao; Mao Wang; Hao Wu; Wenqing Wang; Zhigang Tu. 2018. "Effects of Spartina alterniflora Invasion on the Diet of Mangrove Crabs (Parasesarma plicata) in the Zhangjiang Estuary, China." Journal of Coastal Research 341, no. : 106-113.
The frequency, duration, and intensity of extreme cold events are widely regarded as primary constraints on the upper latitudinal limits of mangroves. Little data are available on the consequences of recovery (or lack thereof) of non-floristic components of mangrove ecosystems after a disturbance caused by cold weather. An unusually severe cold wave occurred in southern China in January 2008. The impact of this cold event and the subsequent recovery of mollusks in a Rhizophora stylosa mangrove forest in southern China were evaluated over a 3-yr study from April 2007 to January 2010. The cold event caused significant mortality of mollusks, which was rapidly followed by an increase in the populations of opportunistic species, and then their subsequent collapse within 6 months. Comparison with data collected in April 2007 (before the cold event) revealed that the density, biomass, and species richness of mollusks decreased by 87.5%, 80.6%, and 56.3%, respectively, except for a transient and compensatory increase in the numbers of benthic mollusks (by 47.5%). Arboreal mollusks were more sensitive to the cold event than benthic species, but both groups showed similar recovery trajectories. After 21 months, the density, biomass, and richness of mollusk species still remained 9.4%, 13.2%, and 26.2% lower than pre-event. Full recovery took more than 24 months. In comparison to mangrove vegetation, mollusks inhabiting mangroves appeared to be more vulnerable to cold events, but also recovered faster. In conclusion, it took more than 2 yr for the species richness of mollusks to recover from the cold event, and the rate of recovery was slower for the arboreal type.
Yi Liu; Mao Wang; Wenqing Wang; Haifeng Fu; Changyi Lu. Chilling damage to mangrove mollusk species by the 2008 cold event in Southern China. Ecosphere 2016, 7, e01312 .
AMA StyleYi Liu, Mao Wang, Wenqing Wang, Haifeng Fu, Changyi Lu. Chilling damage to mangrove mollusk species by the 2008 cold event in Southern China. Ecosphere. 2016; 7 (6):e01312.
Chicago/Turabian StyleYi Liu; Mao Wang; Wenqing Wang; Haifeng Fu; Changyi Lu. 2016. "Chilling damage to mangrove mollusk species by the 2008 cold event in Southern China." Ecosphere 7, no. 6: e01312.