کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4393295 1618269 2013 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Three California annual forbs show little response to neighbor removal
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Three California annual forbs show little response to neighbor removal
چکیده انگلیسی

In semi-arid systems, competition among plants has limited effects on performance compared to facilitative interactions and abiotic factors. However, the balance between competition and facilitation can change over the course of plant development. Determining when each interaction is important for plant productivity allows us to identify factors limiting plant growth. In this field study, neighbor removal mid-way through the growing season did not result in a size change for any species (Clarkia purpurea, Plantago erecta, and Micropus californicus) in the first year. In the second year, two species had greater biomass when neighbors were removed very early in the growing season, indicating a competitive effect. The third species neither benefited nor suffered from neighbor removal. In some years, P. erecta and M. californicus may be negatively affected by competition at early growth stages and are later unable to capitalize on newly-available resources after removals of competitors. This study shows that early-stage competition can drive biomass production in some annual plants, even in semi-arid systems.


► I removed neighboring plants from around target plants at multiple time steps during the growing season.
► Target plants of two species exhibited competitive suppression, not facilitated growth.
► Competitive suppression was triggered only early in the growing season.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Arid Environments - Volume 88, January 2013, Pages 121–124
نویسندگان
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