caa a22 4500 445383828 CHVBK 20180317143025.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10021-011-9418-x doi (NATIONALLICENCE)springer-10.1007/s10021-011-9418-x Simulated Importance of Dispersal, Disturbance, and Landscape History in Long-Term Ecosystem Change in the Big Woods of Minnesota [Elektronische Daten] [Adam Berland, Bryan Shuman, Steven Manson] Dynamic relationships among climate, disturbance, and vegetation affect the spatial configuration and composition of ecological communities. Paleoecological records indicate the importance of such relationships in Minnesota's Big Woods (BW) region, where isolated hardwood forest populations expanded to regional dominance after AD 1250. We used LANDIS-II to model the BW forest expansion, and conducted simulation experiments that isolated the important ecological factors in this regional change. In our simulations, BW forest expanded at approximately 15m per year to achieve regional dominance within 600years, which is comparable to empirical records. The distribution of the BW depended on the locations of scattered pre-existing tree populations that were sheltered from previous severe fire regimes by firebreaks. During the simulated spread of the tree populations, however, the presence or absence of firebreaks did not further influence vegetation pattern. When we assumed a fire rotation of 10-13years in grasslands/woodlands and more than 400years in BW, the feedback between fire-resistant BW fuels and fire severity caused fire severity to decline in a time frame consistent with sedimentary data. In our simulations, seed dispersal from core initial populations caused forest expansion, changed fuel loads, and thus reduced fire severity—not the other way around as has been commonly proposed. Forest expansion was slowed by fire, but species' life history attributes, namely seed dispersal distances and maturity ages, asynchronous successional dynamics across many stands, and landscape history were at least as important in the temporal and spatial patterns of the regional response to climate change. Springer Science+Business Media, LLC, 2011 spatially explicit model nationallicence paleoecology nationallicence fire nationallicence forest expansion nationallicence Big Woods nationallicence Minnesota nationallicence LANDIS-II nationallicence Berland Adam Department of Geography, University of Minnesota, 414 Social Sciences Building, 267 19th Ave S, 55455, Minneapolis, Minnesota, USA aut Shuman Bryan Department of Geography, University of Minnesota, 414 Social Sciences Building, 267 19th Ave S, 55455, Minneapolis, Minnesota, USA aut Manson Steven Department of Geography, University of Minnesota, 414 Social Sciences Building, 267 19th Ave S, 55455, Minneapolis, Minnesota, USA aut Ecosystems Springer-Verlag 14/3(2011-04-01), 398-414 1432-9840 14:3<398 2011 14 10021 https://doi.org/10.1007/s10021-011-9418-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10021-011-9418-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Berland Adam Department of Geography, University of Minnesota, 414 Social Sciences Building, 267 19th Ave S, 55455, Minneapolis, Minnesota, USA aut NATIONALLICENCE 700 1- Shuman Bryan Department of Geography, University of Minnesota, 414 Social Sciences Building, 267 19th Ave S, 55455, Minneapolis, Minnesota, USA aut NATIONALLICENCE 700 1- Manson Steven Department of Geography, University of Minnesota, 414 Social Sciences Building, 267 19th Ave S, 55455, Minneapolis, Minnesota, USA aut NATIONALLICENCE 773 0- Ecosystems Springer-Verlag 14/3(2011-04-01), 398-414 1432-9840 14:3<398 2011 14 10021 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer