Finding the missing link between landscape structure and population dynamics: a spatially explicit perspective
We construct and explore a general modeling framework that allows for a systematic investigation of the impact of changes in landscape structure on population dynamics. The essential parts of the framework are a landscape generator with independent control over landscape composition and physiognomy,...
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ftiowastateuniv:oai:lib.dr.iastate.edu:bot_pubs-1062 2023-05-15T18:42:13+02:00 Finding the missing link between landscape structure and population dynamics: a spatially explicit perspective Wiegand, Thorsten Moloney, Kirk A. Naves, Javier Knauer, Felix 1999-12-01T08:00:00Z application/pdf https://lib.dr.iastate.edu/bot_pubs/63 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1062&context=bot_pubs en eng Iowa State University Digital Repository https://lib.dr.iastate.edu/bot_pubs/63 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1062&context=bot_pubs Botany Publication and Papers habitat connectivity heterogeneous landscapes scaledependent landscape indices population dynamics spatially explicit population models source-sink dynamics Botany Other Ecology and Evolutionary Biology Terrestrial and Aquatic Ecology text 1999 ftiowastateuniv 2018-11-25T23:17:37Z We construct and explore a general modeling framework that allows for a systematic investigation of the impact of changes in landscape structure on population dynamics. The essential parts of the framework are a landscape generator with independent control over landscape composition and physiognomy, an individual-based spatially explicit population model that simulates population dynamics within heterogeneous landscapes, and scale-dependent landscape indices that depict the essential aspects of landscape that interact with dispersal and demographic processes. Landscape maps are represented by a grid of 50#50 cells and consist of good-quality, poorquality, or uninhabitable matrix habitat cells. The population model was shaped in accordance to the biology of European brown bears (Ursus arctos), and demographic parameters were adjusted to yield a source-sink configuration. Results obtained with the spatially explicit model do not confirm results of earlier nonspatial source-sink models where addition of sink habitat resulted in a decrease of total population size because of dilution of high-quality habitat. Our landscape indices, which describe scale-dependent correlation between and within habitat types, were able to explain variations in variables of population dynamics (mean number of females with sink home ranges, mean number of females with source home ranges, and mean dispersal distance) caused by different landscape structure. When landscape structure changed, changes in these variables generally followed the corresponding change of an appropriate landscape index in a linear way. Our general approach incorporates source-sink dynamics as well as metapopulation dynamics, and the population model can easily be modified for other species groups. Text Ursus arctos Digital Repository @ Iowa State University |
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Open Polar |
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Digital Repository @ Iowa State University |
op_collection_id |
ftiowastateuniv |
language |
English |
topic |
habitat connectivity heterogeneous landscapes scaledependent landscape indices population dynamics spatially explicit population models source-sink dynamics Botany Other Ecology and Evolutionary Biology Terrestrial and Aquatic Ecology |
spellingShingle |
habitat connectivity heterogeneous landscapes scaledependent landscape indices population dynamics spatially explicit population models source-sink dynamics Botany Other Ecology and Evolutionary Biology Terrestrial and Aquatic Ecology Wiegand, Thorsten Moloney, Kirk A. Naves, Javier Knauer, Felix Finding the missing link between landscape structure and population dynamics: a spatially explicit perspective |
topic_facet |
habitat connectivity heterogeneous landscapes scaledependent landscape indices population dynamics spatially explicit population models source-sink dynamics Botany Other Ecology and Evolutionary Biology Terrestrial and Aquatic Ecology |
description |
We construct and explore a general modeling framework that allows for a systematic investigation of the impact of changes in landscape structure on population dynamics. The essential parts of the framework are a landscape generator with independent control over landscape composition and physiognomy, an individual-based spatially explicit population model that simulates population dynamics within heterogeneous landscapes, and scale-dependent landscape indices that depict the essential aspects of landscape that interact with dispersal and demographic processes. Landscape maps are represented by a grid of 50#50 cells and consist of good-quality, poorquality, or uninhabitable matrix habitat cells. The population model was shaped in accordance to the biology of European brown bears (Ursus arctos), and demographic parameters were adjusted to yield a source-sink configuration. Results obtained with the spatially explicit model do not confirm results of earlier nonspatial source-sink models where addition of sink habitat resulted in a decrease of total population size because of dilution of high-quality habitat. Our landscape indices, which describe scale-dependent correlation between and within habitat types, were able to explain variations in variables of population dynamics (mean number of females with sink home ranges, mean number of females with source home ranges, and mean dispersal distance) caused by different landscape structure. When landscape structure changed, changes in these variables generally followed the corresponding change of an appropriate landscape index in a linear way. Our general approach incorporates source-sink dynamics as well as metapopulation dynamics, and the population model can easily be modified for other species groups. |
format |
Text |
author |
Wiegand, Thorsten Moloney, Kirk A. Naves, Javier Knauer, Felix |
author_facet |
Wiegand, Thorsten Moloney, Kirk A. Naves, Javier Knauer, Felix |
author_sort |
Wiegand, Thorsten |
title |
Finding the missing link between landscape structure and population dynamics: a spatially explicit perspective |
title_short |
Finding the missing link between landscape structure and population dynamics: a spatially explicit perspective |
title_full |
Finding the missing link between landscape structure and population dynamics: a spatially explicit perspective |
title_fullStr |
Finding the missing link between landscape structure and population dynamics: a spatially explicit perspective |
title_full_unstemmed |
Finding the missing link between landscape structure and population dynamics: a spatially explicit perspective |
title_sort |
finding the missing link between landscape structure and population dynamics: a spatially explicit perspective |
publisher |
Iowa State University Digital Repository |
publishDate |
1999 |
url |
https://lib.dr.iastate.edu/bot_pubs/63 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1062&context=bot_pubs |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_source |
Botany Publication and Papers |
op_relation |
https://lib.dr.iastate.edu/bot_pubs/63 https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=1062&context=bot_pubs |
_version_ |
1766231836246147072 |