کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4385287 1304531 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of management regimes and extreme climatic events on plant population viability in Eryngium alpinum
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
Effects of management regimes and extreme climatic events on plant population viability in Eryngium alpinum
چکیده انگلیسی

Extreme climatic events like the 2003 summer heatwave and inappropriate land management can threaten the existence of rare plants. We studied the response of Eryngium alpinum, a vulnerable species, to this extreme climatic event and different agricultural practices. A demographic study was conducted in seven field sites between 2001 and 2010. Stage-specific vital rates were used to parameterize matrix population models and perform stochastic projections to calculate population growth rates and estimate extinction probabilities. Among management regimes, spring grazing and land abandonment decreased vital rates and population growth, while autumn grazing and late mowing had positive effects on population viability. The 2003 heatwave reduced fecundity rates and survival rates. Only spring grazed sites presented considerable extinction risk. Stochastic projections showed that an increased frequency of 2003-like events may exacerbate extinction risk, but extinction probability depends mainly on land management regimes. To better conserve E. alpinum populations, we recommend conversion of presently spring grazed and abandoned sites to late mowing or autumn grazing.


► Extreme climatic events and inappropriate management can jeopardize plant viability.
► Demography of Eryngium alpinum was studied in seven Alpine sites for ten years.
► The 2003 summer heatwave reduced plant survival, fecundity and population growth.
► Spring grazing and land abandonment decreased vital rates and population growth.
► Autumn grazing and late mowing had positive effects.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biological Conservation - Volume 147, Issue 1, March 2012, Pages 99–106
نویسندگان
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