TY - JOUR
T1 - Simulating population recovery of an aquatic isopod
T2 - Effects of timing of stress and landscape structure
AU - Galic, Nika
AU - Baveco, Hans
AU - Hengeveld, Geerten M.
AU - Thorbek, Pernille
AU - Bruns, Eric
AU - Van Den Brink, Paul J.
PY - 2012/4/1
Y1 - 2012/4/1
N2 - In agroecosystems, organisms may regularly be exposed to anthropogenic stressors, e.g. pesticides. Species' sensitivity to stress depends on toxicity, life-history, and landscape structure. We developed an individual-based model of an isopod, Asellus aquaticus, to explore how timing of stress events affects population dynamics in a seasonal environment. Furthermore, we tested the relevance of habitat connectivity and spatial distribution of stress for the recovery of a local and total population. The simulation results indicated that population recovery is mainly driven by reproductive periods. Furthermore, high habitat connectivity led to faster recovery both for local and total populations. However, effects of landscape structure disappeared for homogeneously stressed populations, where local survivors increased recovery rate. Finally, local populations recovered faster, implying that assessing recovery in the field needs careful consideration of spatial scale for sampling. We emphasize the need for a coherent definition of recovery for more relevant ecosystem risk assessment and management.
AB - In agroecosystems, organisms may regularly be exposed to anthropogenic stressors, e.g. pesticides. Species' sensitivity to stress depends on toxicity, life-history, and landscape structure. We developed an individual-based model of an isopod, Asellus aquaticus, to explore how timing of stress events affects population dynamics in a seasonal environment. Furthermore, we tested the relevance of habitat connectivity and spatial distribution of stress for the recovery of a local and total population. The simulation results indicated that population recovery is mainly driven by reproductive periods. Furthermore, high habitat connectivity led to faster recovery both for local and total populations. However, effects of landscape structure disappeared for homogeneously stressed populations, where local survivors increased recovery rate. Finally, local populations recovered faster, implying that assessing recovery in the field needs careful consideration of spatial scale for sampling. We emphasize the need for a coherent definition of recovery for more relevant ecosystem risk assessment and management.
KW - Asellus aquaticus
KW - Chemical stress
KW - Individual-based model
KW - Population recovery
KW - Spatial stress distribution
UR - http://www.scopus.com/inward/record.url?scp=84855810955&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84855810955&partnerID=8YFLogxK
U2 - 10.1016/j.envpol.2011.12.024
DO - 10.1016/j.envpol.2011.12.024
M3 - Article
C2 - 22325436
AN - SCOPUS:84855810955
VL - 163
SP - 91
EP - 99
JO - Environmental Pollution
JF - Environmental Pollution
SN - 0269-7491
ER -