کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5745265 1412391 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Smoke and Ash Effects on Seedling Emergence from Germinable Soil Seed Bank in Fescue Prairie
ترجمه فارسی عنوان
اثر دود و خاکستر بر ظهور نهال از بذر خاک رسی شده در فرسو پروری
کلمات کلیدی
نشانه های آتش، ترمیم تراکم نهال، ترکیب گونه، غنای گونه،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
چکیده انگلیسی
Seedling recruitment plays a crucial role in recovering plant communities after disturbance. As a natural disturbance, fire can mediate species composition in fescue prairie. However, little was known about the effects of important fire cues on seedling recruitment in fescue prairie. Soil seed bank samples were taken from the top 5 cm of the soil profile and separated into litter, 0- to 1-cm, and 1- to 5-cm layers. Seedlings emerging from soil seed banks incubated in the greenhouse were examined after applying smoke, ash, and smoke plus ash in 2013 and 2014, to assess their effects on the density, richness, and composition of seedlings emerging from the soil seed bank in fescue prairie. Smoke plus ash significantly increased the number of Artemisia ludoviciana Nutt. seedlings emerging from 0- to 1-cm soil layer and Conyza canadensis (L.) Cronquist seedlings emerging from the litter layer (P < 0.05), while ash significantly increased the number of Artemisia frigida Willd. seedlings emerging from 0- to 1-cm soil layer (P < 0.05). Densities of total seedlings emerging from the 0- to 1-cm soil layer were increased by smoke plus ash in 2013 and by ash in 2014 (P < 0.05). Smoke plus ash and ash alone had more prominent effects on seedling density and richness of native forbs. Species composition was altered by ash in the 0- to 1-cm, 0- to 5-cm, and all layers combined in 2013 (P < 0.05). Direct fire cues appear to stimulate recruitment of some species, especially native forbs, contributing to potential changes in species composition of fescue prairie.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Rangeland Ecology & Management - Volume 69, Issue 6, November 2016, Pages 499-507
نویسندگان
, ,