کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4380310 1303984 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Variation in species composition and diversity of wetland communities under different disturbance intensity in the Sanjiang plain
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
Variation in species composition and diversity of wetland communities under different disturbance intensity in the Sanjiang plain
چکیده انگلیسی

In this study, ditch density was chosen as an indicator of disturbance intensity, and four sites with different ditch density were chosen to compare species composition and diversity among them. Four transects and sixty-seven quadrats were sampled along the ditch density gradient. The results showed that there existed a significant negative relationship between disturbance intensity and species parameters, while species diversity did not differ greatly among sites, but species composition varied considerably. With increasing disturbance intensity, the wetlands tended to be reduced in plant species diversity, and an increasing loss of indigenous wetland species was paralleled with an increasing invasion of upland species. The results also show that the rate of species turnover within communities differed among communities under different disturbance intensities. The communities with intermediate ditch density (0.6-1.2 km/km2) had higher rates than the other communities.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Ecologica Sinica - Volume 28, Issue 5, May 2008, Pages 1893-1900