کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8470319 1549943 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Changes in the structural and functional diversity of macrophyte communities along an acidity gradient in softwater lakes
ترجمه فارسی عنوان
تغییرات تنوع ساختاری و عملکردی جوامع ماکروفی در امتداد یک شیب اسیدی در دریاچه های نرم واتر
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی
We present a new approach to the diversity of macrophyte communities based on species richness (S), Simpson's diversity index (SD), Rao's functional diversity (FD), functional attribute diversity (FAD) and the share of life history traits along a gradient of acidity in softwater lakes. On the basis of 10,800 cover-plant samples (squares with an area of 0.1 m2) collected from 241 sections of the bottom (depth belts) of 38 lakes, four communities were identified using the TWINSPAN algorithm: moss carpet (median water pH 4.7), isoetids with acidophytic mosses (pH 5.5), isoetids with neutrophytic mosses (pH 6.3) and neutrophytic vascular plants with charophytes (pH 7.1). Along a gradient of increasing pH, the diversity of communities increases and the species composition and share of life history traits are subject to significant changes. Evergreen, plagiotropic and unanchored plants with small, thin leaves (mosses) are replaced by evergreen, rosette forms (isoetids), which are replaced by non-evergreen charophytes and broadleaf vascular plants, especially pondweeds, in addition to an increasing fraction of plants with generative reproduction. A strong relationship was found between plant traits (leaves and shoots) and environmental factors (pH and calcium content). The regulator of diversity in macrophyte communities is the calcium concentration in water.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Flora - Morphology, Distribution, Functional Ecology of Plants - Volume 216, September 2015, Pages 57-64
نویسندگان
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