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首页> 外文期刊>Ecology letters >Anthropogenic mortality on coral reefs in Caribbean Panama predates coral disease and bleaching
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Anthropogenic mortality on coral reefs in Caribbean Panama predates coral disease and bleaching

机译:加勒比海巴拿马的珊瑚礁上的人为死亡率高于珊瑚病和漂白

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摘要

Caribbean reef corals have declined precipitously since the 1980s due to regional episodes of bleaching, disease and algal overgrowth, but the extent of earlier degradation due to localised historical disturbances such as land clearing and overfishing remains unresolved. We analysed coral and molluscan fossil assemblages from reefs near Bocas del Toro, Panama to construct a timeline of ecological change from the 19th century-present. We report large changes before 1960 in coastal lagoons coincident with extensive deforestation, and after 1960 on offshore reefs. Striking changes include the demise of previously dominant staghorn coral Acropora cervicornis and oyster Dendrostrea frons that lives attached to gorgonians and staghorn corals. Reductions in bivalve size and simplification of gastropod trophic structure further implicate increasing environmental stress on reefs. Our paleoecological data strongly support the hypothesis, from extensive qualitative data, that Caribbean reef degradation predates coral bleaching and disease outbreaks linked to anthropogenic climate change.
机译:自1980年代以来,由于区域性的白化,疾病和藻类过度生长,加勒比珊瑚礁急剧下降,但是由于局部历史干扰(例如开荒和过度捕捞)而导致的早期退化程度仍未解决。我们分析了巴拿马Bocas del Toro附近珊瑚礁的珊瑚和软体动物化石组合,以构建从19世纪至今的生态变化时间表。我们报告了1960年前沿海泻湖与大规模森林砍伐同时发生的重大变化,以及1960年前后近海珊瑚礁的变化。引人注目的变化包括,以前占主导地位的鹿角珊瑚棘角珊瑚(Acropora cervicornis)和生于龙虾和鹿角珊瑚的牡蛎Dendrostrea藻类的消亡。减小双瓣的大小和简化腹足纲的营养结构,进一步暗示了对礁石环境压力的增加。从广泛的定性数据来看,我们的古生态学数据有力地支持了这一假设,即加勒比礁的退化要早于与人类活动的气候变化有关的珊瑚白化和疾病爆发。

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