New York's forest resources, 2009

Widmann, Richard H.; Crawford, S.

doi:10.2737/nrs-rn-101

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“…To identify changes in forest age (i.e., amt of seedling–sapling forest) over time, we used New York data for 1980 and 2005 provided by the U.S. Department of Agriculture Forest Inventory and Analysis (FIA) units (Alerich and Drake 1995, Widmann and Crawford 2011). The FIA program uses aerial photography and sampling of established ground plots to report data on forest type, site attributes, tree species, stand size (tree diam), and changes therein across the United States (Alerich and Drake 1995).…”

Section: Methodsmentioning

confidence: 99%

Effects of landscape‐scale forest change on the range contraction of ruffed grouse in New York State, USA

Porter

Jarzyna

2012

Wildlife Society Bulletin

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In New York State, USA, the abundance of ruffed grouse (Bonasa umbellus) has declined >75% since the 1960s. We hypothesized that range contraction of grouse in New York State was associated with broad-scale spatial patterns relating to forest maturation and that these patterns would be evident at the landscape scale. We evaluated data available from New York Breeding Bird Atlases conducted in the early 1980s and again in the early 2000s, which included surveys of >5,000, 25-km 2 sample blocks across a landscape of 125,384 km 2 . We related detection and non-detection of grouse within Breeding Bird Atlas blocks to forest amount, landscape configuration, and presence of neighboring grouse populations via autologistic regression. Loss of early successional forest was inversely related to the continued persistence of grouse (R 2 ¼ 0.61). Models showed that ruffed grouse were no longer detected in marginal areas of their distribution, blocks with low amounts of forest, and blocks with landscape configurations potentially advantageous to nest predators. We conclude that declines in both habitat quality and quantity have contributed to range contraction within New York State and that the factors affecting grouse populations have acted at broader spatial scales than are typically considered in habitat evaluation. Our work demonstrates that large landscape-scale data sets are valuable in assessing changes in distribution and abundance of wildlife populations. Landscape analyses at large geographic scales (>100,000 km 2 ) are of particular importance to managers because they represent ways of quantifying the influence of economic incentives and land-use policy on habitats across large regions. ß 2012 The Wildlife Society.

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Section: Methodsmentioning

confidence: 99%