Johannes A. van der Walt

Porterville College — United States

Environmental Science · Physical Sciences

5h-index130citations11works0.02yr avg
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Research Topics

Fish Ecology and Management Studies(7), Fish Biology and Ecology Studies(6), Aquatic Invertebrate Ecology and Behavior(3), Aquatic Ecosystems and Phytoplankton Dynamics(2), Plant Diversity and Evolution(2)

Publications11 total

Two new species of Pelargonium sect. Hoarea (Geraniaceae) from the Core Cape Floristic Region, South Africa: P. saronense and P. centrifugum
South African Journal of Botany·2025
Restoring freshwater ecosystems: Lessons from case studies on riparian vegetation, aquatic weeds and freshwater fish
Elsevier eBooks·2024
Contributors
Elsevier eBooks·2024Open Access
Using a head‐start conservation intervention to boost spawning numbers of the endangered Clanwilliam sandfish
Conservation Science and Practice·2023· 2 citedOpen Access
Rapid population decline in one of the last recruiting populations of the endangered Clanwilliam sandfish (<scp><i>Labeo seeberi</i></scp>): The roles of climate change and non‐native fish
Aquatic Conservation Marine and Freshwater Ecosystems·2022· 10 citedOpen Access
Geissorhiza mellimontana (Iridaceae: Crocoideae), a new species from southwestern Western Cape, South Africa
South African Journal of Botany·2021· 3 citedOpen Access
Ecosystem responses to the eradication of common carp <scp><i>Cyprinus carpio</i></scp> using rotenone from a reservoir in South Africa
Aquatic Conservation Marine and Freshwater Ecosystems·2020· 13 citedOpen Access
Successful mechanical eradication of spotted bass (<scp><i>Micropterus punctulatus</i></scp> (Rafinesque, 1819)) from a South African river
Aquatic Conservation Marine and Freshwater Ecosystems·2019· 22 cited
Vulnerability of Cape Fold Ecoregion freshwater fishes to climate change and other human impacts
Aquatic Conservation Marine and Freshwater Ecosystems·2017· 28 citedOpen Access
Conservation implications of establishment success of the Critically Endangered Twee River redfin ‘<i>Pseudobarbus’ erubescens</i> (Skelton, ) in an artificial impoundment in South Africa
Aquatic Conservation Marine and Freshwater Ecosystems·2017· 5 cited
Spatial extent and consequences of black bass (Micropterus spp.) invasion in a Cape Floristic Region river basin
Aquatic Conservation Marine and Freshwater Ecosystems·2015· 47 cited

Frequent Co-authors

Olaf L. F. Weyl(7), Jeremy M. Shelton(5), Martine S. Jordaan(5), Karen J. Esler(3), N. Dean Impson(3), Sean M. Marr(3), Bruce R. Paxton(3), Tatenda Dalu(2), Mandy Schumann(2), Cecilia Cerrilla(2), Dean Impson(2), John C. Manning(2), Julie A. Coetzee(2), Martin Hill(2), Samuel N. Motitsoe(2), Matthew J. Burnett(2), Darragh J. Woodford(1), Frans G.T. Radloff(1), Albert Chakona(1), Bruce R. Ellender(1)