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Mr. Jonathan Hernandez
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0 Botany
0 Forest Ecology
0 Drought
0 Tree physiology
0 ecophysiology

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Research paper
Published: 02 April 2021 in Annals of Forest Science
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Local climate exerted a stronger effect on leaf litter decomposition of deciduous Quercus acutissima Carruth. and evergreen Quercus glauca Thunb. than initial leaf litter quality: the decomposition was much faster for leaves of the two species in warm-temperate forest than in the cool-temperate one. Litter decomposition mainly depends on initial litter quality (e.g., physical features and nutrient content). However, the effects of litter quality on decomposition remain inconclusive in different climatic zones due to complex interaction with climatic factors. This study investigated the effect of litter quality and climatic factors on litter decomposition of deciduous Quercus acutissima Carruth. and evergreen Quercus glauca Thunb. in warm-temperate forests in Jeju Island (Cheongsu; Seonheul) and cool-temperate forest at Chungnam National University Experimental Forest (CNU). Through an inter-site experiment and litterbag technique, variations in remaining mass and decomposition coefficients (k) were measured from the two Quercus species in Korea. The initial mass loss was rapid during the wettest months in summer season. Annual k varied significantly by site: Seonheul (0.77 year−1 ± 0.03) > Cheongsu (0.62 year−1 ± 0.02) > CNU (0.42 year−1 ± 0.01). Leaf litter decomposition was similar for the two species in the warm-temperate sites and 36% higher in the deciduous species in the cool-temperate site. Based on the principal component analysis, overall k values were strongly correlated (rho = 0.55–0.60) with climatic factors, and no significant correlation was detected in leaf litter quality. In conclusion, our results highlighted that the climatic condition in the study sites predominantly controlled the litter decomposition of the deciduous and evergreen oak species, with nevertheless an interspecific difference in the coolest site.

ACS Style

Byung Bae Park; Si Ho Han; Jonathan O. Hernandez; Ji Young An; Woo Bin Youn; Hyung-Soon Choi; Sungcheol Jung. Leaf litter decomposition of deciduous Quercus acutissima Carruth. and evergreen Quercus glauca Thunb. in an inter-site experiment in three contrasting temperate forest stands in South Korea. Annals of Forest Science 2021, 78, 1 -11.

AMA Style

Byung Bae Park, Si Ho Han, Jonathan O. Hernandez, Ji Young An, Woo Bin Youn, Hyung-Soon Choi, Sungcheol Jung. Leaf litter decomposition of deciduous Quercus acutissima Carruth. and evergreen Quercus glauca Thunb. in an inter-site experiment in three contrasting temperate forest stands in South Korea. Annals of Forest Science. 2021; 78 (2):1-11.

Chicago/Turabian Style

Byung Bae Park; Si Ho Han; Jonathan O. Hernandez; Ji Young An; Woo Bin Youn; Hyung-Soon Choi; Sungcheol Jung. 2021. "Leaf litter decomposition of deciduous Quercus acutissima Carruth. and evergreen Quercus glauca Thunb. in an inter-site experiment in three contrasting temperate forest stands in South Korea." Annals of Forest Science 78, no. 2: 1-11.

Journal article
Published: 31 March 2021 in Forests
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Nursery practices are considered major factors influencing seedling quality, which are likely to be maintained in the early establishment phase in the field. Here, we investigated the effects of container depth and substrate heterogeneity on the growth of Populus sibirica nodal seedlings to suggest an effective nursery practice for producing quality seedlings appropriate for forest establishment in a dry environment. We used two substrate heterogeneities (homogeneous and heterogeneous) and two container depth treatments (30 and 60 cm). Variations in root collar diameter (RCD) growth, height growth, stem and root biomass, root to stem ratio, and root mass in the first 15 cm depth from the soil surface across the treatments were computed. Results revealed that both substrate heterogeneity and container depth had no significant effects on the RCD and height growth of P. sibirica seedlings but significantly improved their root and stem biomass. Seedlings in the 60 cm containers generally accumulated higher root biomass than those in the 30 cm containers. There was an interaction effect of container depth and substrate heterogeneity treatments on root and total dry mass, such that seedlings grown in the 60 cm container using heterogeneous substrate resulted in the highest root and total biomass. Analyses of proportional root growth in the upper 15 cm of the containers compared to the total indicated that both the main effects of deeper containers (60 cm) and heterogeneous substrate have fewer roots at this depth, indicating a greater root density in the bottom of the deeper containers. Therefore, deeper containers and heterogeneous substrate may be used as an effective nursery practice to produce seedlings with root traits potentially suitable for harsh conditions, such as arid and semi-arid environments. However, further studies using other seedling morphological traits in conjunction with field-trial tests are needed for a definitive assessment of the effectiveness of deeper containers and heterogeneous substrate in producing good quality seedlings potentially suitable in a dry environment.

ACS Style

Byung Park; Si Han; Jonathan Hernandez; Ji An; Batkhuu Nyam-Osor; Mun Jung; Peter Lee; Sang Lee. The Use of Deep Container and Heterogeneous Substrate as Potentially Effective Nursery Practice to Produce Good Quality Nodal Seedlings of Populus sibirica Tausch. Forests 2021, 12, 418 .

AMA Style

Byung Park, Si Han, Jonathan Hernandez, Ji An, Batkhuu Nyam-Osor, Mun Jung, Peter Lee, Sang Lee. The Use of Deep Container and Heterogeneous Substrate as Potentially Effective Nursery Practice to Produce Good Quality Nodal Seedlings of Populus sibirica Tausch. Forests. 2021; 12 (4):418.

Chicago/Turabian Style

Byung Park; Si Han; Jonathan Hernandez; Ji An; Batkhuu Nyam-Osor; Mun Jung; Peter Lee; Sang Lee. 2021. "The Use of Deep Container and Heterogeneous Substrate as Potentially Effective Nursery Practice to Produce Good Quality Nodal Seedlings of Populus sibirica Tausch." Forests 12, no. 4: 418.

Journal article
Published: 20 February 2021 in Land
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Long-term studies on plant response mechanisms to different irrigation regimes will provide a better understanding of the survivability and establishment of plant communities in a desert environment. Thus, across 10 years, we regularly investigated the effects of the rainfall (control), rainfall + 4 L h−1, rainfall + 8 L h−1, and rainfall + 12 L h−1 irrigation regimes on the growth and leaf morpho-physiology of Tamarix ramosissima Ledeb., Ulmus pumila L., Elaeagnus moorcroftii Wall. ex Schltdl., and Hippophae rhamnoides L. to suggest an optimal irrigation regime for each woody species for effective and sustainable afforestation in Mongolia. We measured the root collar diameter (RCD), annual height growth, survivability, leaf area (LA), specific leaf area (SLA), leaf biomass (LB), total chlorophyll concentration, and predawn (ψp) and midday (ψm) leaf water potentials across the treatments and species. Results showed that trees grown at 12 L h−1 grew taller per year and generally resulted in a higher SLA, but generally resulted in a lower survival rate compared with those in the other treatments in all species. Total chlorophyll content was higher in trees grown under 4 and/or 8 L h−1, particularly for T. ramosissima and E. moorcroftii. Lastly, leaf water potentials were found more negative for trees subjected to 4 L h−1, especially in T. ramosissima and U. pumila, but still resulted in a higher survival rate and LB compared with 12 L h−1. H. rhamnoides showed higher survivability at 8 and/or 12 L h−1 than at 4 L h−1. Therefore, we suggest 4 L h−1 to be the optimal irrigation regime for irrigating T. ramosissima, U. pumila and E. moorcroftii, and 8 and/or 12 L h−1 for H. rhamnoides. Our findings are relevant to ensuring the sustainability of afforestation programs in arid and semiarid landscapes in Mongolia.

ACS Style

Ser-Oddamba Byambadorj; Byung Park; Jonathan Hernandez; Narantugs Dulamsuren; Zoljargal Sainbuyan; Oyuntugs Altantugs; Khulan Sharavdorj; In Seong; Nyam-Osor Batkhuu. Optimal Irrigation Regime for Woody Species Potentially Suitable for Effective and Sustainable Afforestation in the Desert Region of Mongolia. Land 2021, 10, 212 .

AMA Style

Ser-Oddamba Byambadorj, Byung Park, Jonathan Hernandez, Narantugs Dulamsuren, Zoljargal Sainbuyan, Oyuntugs Altantugs, Khulan Sharavdorj, In Seong, Nyam-Osor Batkhuu. Optimal Irrigation Regime for Woody Species Potentially Suitable for Effective and Sustainable Afforestation in the Desert Region of Mongolia. Land. 2021; 10 (2):212.

Chicago/Turabian Style

Ser-Oddamba Byambadorj; Byung Park; Jonathan Hernandez; Narantugs Dulamsuren; Zoljargal Sainbuyan; Oyuntugs Altantugs; Khulan Sharavdorj; In Seong; Nyam-Osor Batkhuu. 2021. "Optimal Irrigation Regime for Woody Species Potentially Suitable for Effective and Sustainable Afforestation in the Desert Region of Mongolia." Land 10, no. 2: 212.

Review
Published: 04 December 2020 in Plants
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Windstorm is one of the destructive natural disturbances, but the scale-link extent to which recurrent windstorms influenced forests ecosystems is poorly understood in a changing climate across regions. We reviewed the synergistic impacts of windstorms on forests and assessed research trends and methodological approaches from peer-reviewed articles published from 2000 to 2020 in tropical (TRF), subtropical (SUF), and temperate (TEF) forests/zones, based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Overall, the majority of the reviewed studies were conducted in TRF (i.e., 40%), intermediate in SUF (i.e., 34%), and the lowest in TEF (i.e., 26%). Among the four levels of biological organization, the species-population and community-ecosystem levels had the highest number of study cases, while the molecular-cellular-individual and landscape levels had the lowest study cases in all forest types. Most of the articles reviewed dealt largely on tree mortality/survival and regeneration/succession for TRF, tree mortality/survival and species composition/richness/diversity for SUF, and stem density, gap dynamics, and regeneration/succession for TEF. However, research on the effects of windstorms on mycorrhizal symbioses, population genetics, and physiological adaptation, element fluxes via litterfall, litter decomposition, belowground processes, biological invasion, and tree health are less common in all forest types. Further, most of the studies were conducted in permanent plots but these studies mostly used observational design, while controlled studies are obviously limited. Consequently, more observational and controlled studies are needed on the topic reviewed, particularly studies at the molecular-cellular-individual and landscape levels, to help inform forest management decision-making about developing sustainable and resilient forests amid climate change.

ACS Style

Jonathan O. Hernandez; Lerma S.J. Maldia; Byung Bae Park. Research Trends and Methodological Approaches of the Impacts of Windstorms on Forests in Tropical, Subtropical, and Temperate Zones: Where Are We Now and How Should Research Move Forward? Plants 2020, 9, 1709 .

AMA Style

Jonathan O. Hernandez, Lerma S.J. Maldia, Byung Bae Park. Research Trends and Methodological Approaches of the Impacts of Windstorms on Forests in Tropical, Subtropical, and Temperate Zones: Where Are We Now and How Should Research Move Forward? Plants. 2020; 9 (12):1709.

Chicago/Turabian Style

Jonathan O. Hernandez; Lerma S.J. Maldia; Byung Bae Park. 2020. "Research Trends and Methodological Approaches of the Impacts of Windstorms on Forests in Tropical, Subtropical, and Temperate Zones: Where Are We Now and How Should Research Move Forward?" Plants 9, no. 12: 1709.

Journal article
Published: 20 July 2020 in Sustainability
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Knowledge on growth and nutrient uptake characteristics of urban trees and effective strategies to grow trees can help accomplish the goal of urban afforestation initiatives in a sustainable way. Thus, the study investigated the effects of different vermicompost (VC) application placements on the growth and nutrient uptake of three contrasting tree species (fast-growing Betula platyphylla and Larix kaempferi and slow-growing Chamaecyparis obtusa) to provide implications for growing tree stocks for sustainable urban afforestation programs. Five placement methods were used in the greenhouse trial: no fertilization (CON), surface placement (VCs), subsurface placement at 6-cm depth (VCc), bottom placement (35-cm depth (VCb)), and mixed with soil (VCm). We measured the growth parameters such as height, root collar diameter (RCD), and biomass and analyzed foliar nutrient concentrations in response to different placement treatments of VC. Relative height growth was the highest at VCc (132% (B. platyphylla), 114% (L. kaempferi)) and VCs ((57%) C. obtusa). Significant improvement in aboveground and belowground biomass growth of all species at VCs and VCc compared to the other treatments was also observed. Generally, VC treatments significantly increased N concentration compared to CON in all species. In conclusion, fertilizing the fast- and slow-growing urban tree species using VCs and/or VCc is relevant to growing high quality planting stocks for sustainable urban afforestation purposes.

ACS Style

Huong Dao; Jeong Seo; Jonathan Hernandez; Si Ho Han; Woo Youn; Ji An; Byung Park. Effective Placement Methods of Vermicompost Application in Urban Tree Species: Implications for Sustainable Urban Afforestation. Sustainability 2020, 12, 5822 .

AMA Style

Huong Dao, Jeong Seo, Jonathan Hernandez, Si Ho Han, Woo Youn, Ji An, Byung Park. Effective Placement Methods of Vermicompost Application in Urban Tree Species: Implications for Sustainable Urban Afforestation. Sustainability. 2020; 12 (14):5822.

Chicago/Turabian Style

Huong Dao; Jeong Seo; Jonathan Hernandez; Si Ho Han; Woo Youn; Ji An; Byung Park. 2020. "Effective Placement Methods of Vermicompost Application in Urban Tree Species: Implications for Sustainable Urban Afforestation." Sustainability 12, no. 14: 5822.

Journal article
Published: 26 January 2020 in Forests
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Knowledge about carbon and nutrient fluxes by litterfall is important for understanding nutrient cycling in geologically unique ecosystems. However, the determination of forest litterfall production patterns is difficult due to many biophysical factors influencing the process. In this study, we (1) quantified the litterfall production and carbon and nutrient fluxes in warm-temperate evergreen forest stands in Jeju Gotjawal and (2) compared these values to those of a typical cool-temperate deciduous forest stand by forest types and climate differences. Litterfall from evergreen broadleaved forests at Cheongsu (CS) and Seonheul (SHb), a mixed forest at Seonheul (SHm) in Jeju Gotjawal, and a deciduous broadleaved forest at Chungnam National University Forest (CNU) was collected for a full two years using litter traps. Samples were sorted into leaves, twigs, barks, seeds, and unidentified materials, and then weighed and measured for C, N, P, K, Ca, and Mg fluxes by litterfall. Results showed that the mean annual litterfall (846.3 g m−2, average of CS, SHb, and SHm) at Jeju Gotjawal was similar to that of CNU (885.5 g m−2), but varied by site in Jeju Gotjawal: CS (933.1 g m−2) was significantly higher than the average of SHb and SHm (802.9 g m−2). Seasonal patterns of litterfall production differed by forest types; evergreen broadleaved forests showed a bimodal peak in fall and spring while deciduous broadleaved forests showed a unimodal peak in fall. Jeju Gotjawal had significantly higher total macronutrient concentrations and contents (except for K) than CNU and they also varied by site in Jeju Gotjawal: CS had higher N, P, Ca, and Mg contents than SHb and SHm. We conclude that litterfall production and nutrient fluxes differed by forest stand as influenced by forest types and climate. Further, our findings are important for understanding carbon and nutrient dynamics in the geologically unique ecosystem of Jeju Gotjawal and other areas with similar characteristics.

ACS Style

Byung Bae Park; Afroja Rahman; Si Ho Han; Woo Bin Youn; Hwa Ja Hyun; Jonathan Hernandez; Ji Young An. Carbon and Nutrient Inputs by Litterfall in Evergreen and Deciduous Forests in Korea. Forests 2020, 11, 143 .

AMA Style

Byung Bae Park, Afroja Rahman, Si Ho Han, Woo Bin Youn, Hwa Ja Hyun, Jonathan Hernandez, Ji Young An. Carbon and Nutrient Inputs by Litterfall in Evergreen and Deciduous Forests in Korea. Forests. 2020; 11 (2):143.

Chicago/Turabian Style

Byung Bae Park; Afroja Rahman; Si Ho Han; Woo Bin Youn; Hwa Ja Hyun; Jonathan Hernandez; Ji Young An. 2020. "Carbon and Nutrient Inputs by Litterfall in Evergreen and Deciduous Forests in Korea." Forests 11, no. 2: 143.