Benthic communities under anthropogenic pressure show resilience across the Quaternary

The Southeast Pacific is characterized by rich upwelling systems that have sustained and been impacted by human groups for at least 12 ka. Recent fishing and aquaculture practices have put a strain on productive coastal ecosystems from Tongoy Bay, in north-central Chile. We use a temporal baseline to determine whether potential changes to community structure and composition over time are due to anthropogenic factors, natural climatic variations or both. We compiled a database (n = 33 194) with mollusc species abundances from the Mid-Pleistocene, Late Pleistocene, Holocene, dead shell assemblages and live-sampled communities. Species richness was not significantly different, neither were diversity and evenness indices nor rank abundance distributions. There is, however, an increase in relative abundance for the cultured scallop Argopecten, while the previously dominant clam Mulinia is locally very rare. Results suggest that impacts from both natural and anthropogenic stressors need to be...东南太平洋以发育丰富的上升流系统为特征，该系统至少12 ka间支撑了人类族群的生存，并受到人类活动的影响。近期的渔业与水产养殖活动，已对智利中北部通戈伊湾（Tongoy Bay）的高生产力沿岸生态系统造成了胁迫压力。本研究以时间序列基线为参照，旨在厘清群落结构与组成随时间发生的潜在变化，究竟是由人为因素、自然气候变化，抑或是两者共同作用所导致。我们构建了一个包含33194条记录的数据库，涵盖中更新世、晚更新世、全新世的软体动物物种丰度数据，以及死壳组合与现生采样群落的相关数据。物种丰富度并无显著差异，多样性指数、均匀度指数以及等级丰度分布亦未出现明显变化。然而，养殖扇贝属（Argopecten）的相对丰度有所上升，而此前占据优势的蛤属（Mulinia）在当地已极为罕见。研究结果表明，针对自然与人为双重胁迫因子的影响亟需……