کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6387618 | 1627568 | 2016 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Limpets compensate sea urchin decline and enhance the stability of rocky subtidal barrens
ترجمه فارسی عنوان
کرانه ها جبران کاهش یخ زده دریا را افزایش می دهند و ثبات حوضچه های زیر زمینی سنگی را افزایش می دهند
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کلمات کلیدی
کشورهای جایگزین، گیاهخواران، تغذیه بهبود، صخره های صخره ای،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
اقیانوس شناسی
چکیده انگلیسی
Understanding the mechanisms that regulate shifts among alternative ecosystems has become a priority for ecologists and environmental scientists. This study assessed the relative importance of different herbivorous invertebrates (urchins and limpets) in regulating transitions from barren to vegetated states on Mediterranean rocky reefs, under different levels of nutrient availability. Nutrient concentration and the herbivore assemblage were manipulated to test i) whether limpets can compensate for the decline or loss of sea urchin populations, thereby contributing to the persistence of barrens, ii) whether limpet effects vary according to nutrient availability and iii) whether limpets affect the structure of the algal assemblage. The complete removal of sea urchins was not sufficient to trigger the recovery of erect and turf-forming macroalgae if limpets were left at natural density, suggesting that these herbivores play an important role in the stability of the barren state. The effect of these mesograzers was particularly important under oligotrophic conditions. This suggests that limpets play an important role in sustaining the stability of the barren state. A more comprehensive assessment of top-down forces, implying the quantification of the relative effect of different herbivore guilds, is therefore necessary to estimate the strength of hysteresis and to identify critical thresholds at which shifts back to the vegetated state are initiated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Environmental Research - Volume 115, April 2016, Pages 49-55
Journal: Marine Environmental Research - Volume 115, April 2016, Pages 49-55
نویسندگان
Luigi Piazzi, Fabio Bulleri, Giulia Ceccherelli,