Alexander Ziemba

Mr. Alexander Ziemba

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Research Focus & Metrics

Academic Career Length

10Years (2017-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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29 November 2017 in Ecosystems and People
Verified
Journal Article
Open access
EDEvangelia Drakou
Evangelia Drakou
CKCharlène Kermagoret
Charlène Kermagoret
CLCamino Liquete
Camino Liquete
ARAna Ruiz-Frau
Ana Ruiz-Frau
KBKremena Burkhard
Kremena Burkhard
PPPlamen Peev
Plamen Peev
We compared and contrasted 11 European case studies to identify challenges and opportunities toward the operationalization of marine and coastal ecosystem service (MCES) assessments in Europe. This work is the output of a panel convened by the Marine Working Group of the Ecosystem Services Partnership in September 2016. The MCES assessments were used to (1) address multiple policy objectives simultaneously, (2) interpret EU-wide policies to smaller scales and (3) inform local decision-making. Most of the studies did inform decision makers, but only in a few cases, the outputs were applied or informed decision-making. Significant limitations among the 11 assessments were the absence of shared understanding of the ES concept, data and knowledge gaps, difficulties in accounting for marine social–ecological systems complexity and partial stakeholder involvement. The findings of the expert panel call for continuous involvement of MCES ‘end users’, integrated knowledge on marine social–ecological systems, defining thresholds to MCES use and raising awareness to the general public. Such improvements at the intersection of science, policy and practice are essential starting points toward building a stronger science foundation supporting management of European marine ecosystems.

6 August 2018 in Methods in Ecology and Evolution
Verified
Journal Article
Open access
PDF file
DPDamiano Pasetto
Damiano Pasetto
Salvador Arenas-CastroSalvador Arenas-Castro
Salvador Arenas-Castro
Javier BustamanteJavier Bustamante
Javier Bustamante
RCRenato Casagrandi
Renato Casagrandi
Chrysoulakis NektariosChrysoulakis Nektarios
Chrysoulakis Nektarios
GZGuy Ziv
Guy Ziv
Spatiotemporal ecological modelling of terrestrial ecosystems relies on climatological and biophysical Earth observations. Due to their increasing availability, global coverage, frequent acquisition and high spatial resolution, satellite remote sensing (SRS) products are frequently integrated to in situ data in the development of ecosystem models (EMs) quantifying the interaction among the vegetation component and the hydrological, energy and nutrient cycles. This review highlights the main advances achieved in the last decade in combining SRS data with EMs, with particular attention to the challenges modellers face for applications at local scales (e.g. small watersheds). We critically review the literature on progress made towards integration of SRS data into terrestrial EMs: (1) as input to define model drivers; (2) as reference to validate model results; and (3) as a tool to sequentially update the state variables, and to quantify and reduce model uncertainty. The number of applications provided in the literature shows that EMs may profit greatly from the inclusion of spatial parameters and forcings provided by vegetation and climatic‐related SRS products. Limiting factors for the application of such models to local scales are: (1) mismatch between the resolution of SRS products and model grid; (2) unavailability of specific products in free and public online repositories; (3) temporal gaps in SRS data; and (4) quantification of model and measurement uncertainties. This review provides examples of possible solutions adopted in recent literature, with particular reference to the spatiotemporal scales of analysis and data accuracy. We propose that analysis methods such as stochastic downscaling techniques and multi‐sensor/multi‐platform fusion approaches are necessary to improve the quality of SRS data for local applications. Moreover, we suggest coupling models with data assimilation techniques to improve their forecast abilities. This review encourages the use of SRS data in EMs for local applications, and underlines the necessity for a closer collaboration among EM developers and remote sensing scientists. With more upcoming satellite missions, especially the Sentinel platforms, concerted efforts to further integrate SRS into modelling are in great demand and these types of applications will certainly proliferate.

15 November 2017 in PLOS ONE
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Journal Article
Open access
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CHChristiaan Hummel
Christiaan Hummel
APAntonello Provenzale
Antonello Provenzale
JMJaap van der Meer
Jaap van der Meer
SWSander Wijnhoven
Sander Wijnhoven
ANArno Nolte
Arno Nolte
HHHerman Hummel
Herman Hummel
Protected Areas are a key component of nature conservation. They can play an important role in counterbalancing the impacts of ecosystem degradation. For an optimal protection of a Protected Area it is essential to account for the variables underlying the major Ecosystem Services an area delivers, and the threats upon them. Here we show that the perception of these important variables differs markedly between scientists and managers of Protected Areas in mountains and transitional waters. Scientists emphasise variables of abiotic and biotic nature, whereas managers highlight socio-economic, cultural and anthropogenic variables. This indicates fundamental differences in perception. To be able to better protect an area it would be advisable to bring the perception of scientists and managers closer together. Intensified and harmonised communication across disciplinary and professional boundaries will be needed to implement and improve Ecosystem Service oriented management strategies in current and future Protected Areas.

Verified
Journal Article
Open access
PDF file
ASAnna Spinosa
Anna Spinosa
AZAlexander Ziemba
Alexander Ziemba
Alessandra SaponieriAlessandra Saponieri
Alessandra Saponieri
Leonardo DamianiLeonardo Damiani
Leonardo Damiani
GSGhada El Serafy
Ghada El Serafy
Remote sensing and satellite imagery have become commonplace in efforts to monitor and model various biological and physical characteristics of the Earth. The land/water interface is a continually evolving landscape of high scientific and societal interest, making the mapping and monitoring thereof particularly important. This paper aims at describing a new automated method of shoreline position detection through the utilization of Synthetic Aperture Radar (SAR) images derived from European Space Agency satellites, specifically the operational SENTINEL Series. The resultant delineated shorelines are validated against those derived from video monitoring systems and in situ monitoring; a mean distance of 1 and a maximum of 3.5 pixels is found.

1 April 2019 in Global Ecology and Conservation
Verified
Journal Article
Open access
CGC.A. Guerra
C.A. Guerra
LPL. Pendleton
L. Pendleton
EDE.G. Drakou
E.G. Drakou
VPVânia Proença
Vânia Proença
WAW. Appeltans
W. Appeltans
HPH.M. Pereira
H.M. Pereira

9 September 2019 in Environment Systems and Decisions
Verified
Journal Article
Open access
PDF file
SHSolveig Höfer
Solveig Höfer
AZAlexander Ziemba
Alexander Ziemba
Ghada Y. El SerafyGhada Y. El Serafy
Ghada Y. El Serafy
The concept of ecosystem services is gaining attention in the context of sustainable resource management. However, it is inherently difficult to account for tangible and intangible services in a combined model. The aim of this study is to extend the definition of ecosystem service trade-offs by using Bayesian Networks to capture the relationship between tangible and intangible ecosystem services. Tested is the potential of creating such a network based on existing literature and enhancement via expert elicitation. This study discusses the significance of expert elicitation to enhance the value of a Bayesian Network in data-restricted case studies, underlines the importance of inclusion of experts’ certainty, and demonstrates how multiple sources of knowledge can be combined into one model accounting for both tangible and intangible ecosystem services. Bayesian Networks appear to be a promising tool in this context, nevertheless, this approach is still in need of further refinement in structure and applicable guidelines for expert involvement and elicitation for a more unified methodology.