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@ARTICLE{Beuel:820884,
author = {Beuel, Sonja and Alvarez, Miguel and Amler, Esther and
Behn, Kai and Kotze, Donovan and Kreye, Christine and
Leemhuis, Constanze and Wagner, Katrin and Willy, Daniel
Kyalo and Ziegler, Susanne and Becker, Mathias},
title = {{A} rapid assessment of anthropogenic disturbances in
{E}ast {A}frican wetlands},
journal = {Ecological indicators},
volume = {67},
issn = {1470-160X},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2016-06148},
pages = {684 - 692},
year = {2016},
abstract = {The use of East African freshwater wetlands for agriculture
has increased in recent decades, raising concerns about
potential impacts on wetlands and the long-term
sustainability of such land use trends. WET-health is an
indicator-based rapid wetland assessment approach developed
in South Africa. It allows determining the conditions of
wetlands in four assessment modules (hydrology,
geomorphology, vegetation, and water quality) by observing
the degree of deviation of a wetland from its anticipated
natural reference state. We tested the transferability of
the WET-health concept for East African inland valley swamps
and floodplain wetlands based on 114 assessment units at
four study sites. Due to large wetland areas and different
environmental settings in East Africa, we modified the
original approach using a random selection of assessment
units and an assessment scheme based on disturbance types
(Appendices A and B). Estimated WET-health impact scores
were matched with biophysical and socioeconomic variables
using a generalized linear mixed model. Land use included
largely undisturbed wetland units occurring side by side
with seasonally cropped or grazed units, and drained,
permanently cultivated units. A strong differentiation of
impact scores between the four assessment modules was
apparent with highest scores for vegetation and lowest
scores for geomorphology. Vegetation and water quality
responded most sensitively to land use changes. The
magnitude of wetland disturbance is predominantly determined
by management factors such as land use intensity, soil
tillage, drainage intensity, and the application of
agrochemicals and influences vegetation attributes and the
provision of ecosystem services. The proposed modification
of WET-health enables users to assess large wetland areas
during relatively short periods of time. While further
studies will be required, WET-health appears to be a
promising concept to be applied to wetlands in East Africa
and possibly beyond.},
cin = {IBG-3},
ddc = {570},
cid = {I:(DE-Juel1)IBG-3-20101118},
pnm = {255 - Terrestrial Systems: From Observation to Prediction
(POF3-255)},
pid = {G:(DE-HGF)POF3-255},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000388785300066},
doi = {10.1016/j.ecolind.2016.03.034},
url = {https://juser.fz-juelich.de/record/820884},
}