Landscape Fragmentation and Ice Storm Damage in Eastern Ontario Forests |
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Authors: | J?Pasher Email author" target="_blank">D?J?KingEmail author |
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Institution: | (1) Department of Geography and Environmental Studies, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada, K1S 5B6 |
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Abstract: | With return times between 20 and 100 years, ice storms are a primary disturbance type for temperate forests of eastern North
America. Many studies have been conducted at the forest patch and plot scales to examine relations between damage and variables
describing site, composition and structure. This paper presents results from a landscape scale study of fragmentation relations
with damage in eastern Ontario forests. Data previously collected for two independent and spatially non-overlapping patch
level damage studies were used. A Generalized Linear Model (GLM) was used to analyse relations between damage and fragmentation
metrics representing patch isolation, edge density, and the relative size and distribution of patches in the landscape. The
metrics were applied using spatial extents of 1 × 1 km and 4 × 4 km, following analyses of the variability of numbers of patches
and of the lacunarity of forest patterns over a range of extents. The results showed that patch isolation, as measured by
the mean Euclidean distance between patches (ENN) was significantly related to damage. |
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Keywords: | Damage Disturbance Fragmentation metrics General linear model Ice storm Lacunarity Landscape extent Temperate forest |
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