NDLI: Long-term effects of managing for an endangered songbird on the heterogeneity of a fire-prone landscape

Content Provider	Springer Nature Link
Author	Tucker, Madelyn M. Corace, R. Gregory Cleland, David T. Kashian, Daniel M.
Copyright Year	2016
Abstract	Jack pine (Pinus banksiana)-dominated ecosystems of northern Lower Michigan are the primary breeding habitat for the federally endangered Kirtland’s warbler (Setophaga kirtlandii, KW). Historically, young stands used by KW were produced by stand-replacing wildfires, but fire suppression has necessitated the management of jack pine plantations for KW habitat since the 1970s. Effects of this long-term management on landscape age heterogeneity have previously not been quantified.We hypothesized that forest management has altered the spatial and temporal distribution of jack pine-dominated ecosystems beyond their historic range of variability.By developing a diameter-age relationship for jack pine, we estimated ages of pre-European settlement trees found in General Land Office survey notes. We compared pre-European and current landscapes using geostatistical modeling of survey notes, and landscape metrics to quantify changes in pattern.Three KW management-based age classes (<20, 21–50, >50 years) are now more evenly distributed (31, 39, and 30 %, respectively) compared to the pre-European distribution (5, 19, 76 %) with little variability over time. Landscape metrics suggest the current landscape is younger and more fragmented than the pre-European landscape. These changes indicate restriction of the historic range of age variability, largely due to conversion of older jack pine stands to young KW habitat plantations.Management has met KW population objectives, but has altered the temporal variability of the landscape’s age structure. Pre-European settlement patterns of stand-ages may provide a foundation for an ecosystem-based management plan for the region that supports both KW and the ecosystems upon which they depend.
Starting Page	2445
Ending Page	2458
Page Count	14
File Format	PDF
ISSN	09212973
Journal	Landscape Ecology
Volume Number	31
Issue Number	10
e-ISSN	15729761
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-07-15
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Jack pine Historic range of variability Pre-European settlement Public land surveys Northern Lower Michigan Kirtland’s warbler Landscape Ecology Ecology Nature Conservation Landscape/Regional and Urban Planning Sustainable Development Environmental Management
Content Type	Text
Resource Type	Article
Subject	Geography, Planning and Development Ecology Nature and Landscape Conservation

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