Hench K, Mcmillan W O, Betancur-R R, Puebla O
GEOMAR Helmholtz Centre for Ocean Research Kiel, Evolutionary Ecology of Marine Fishes, Düsternbrooker Weg 20, 24105 Kiel, Germany.
Smithsonian Tropical Research Institute, Apartado Postal 0843-03092, Panamá, República de Panamá.
J Fish Biol. 2017 Nov;91(5):1475-1490. doi: 10.1111/jfb.13481. Epub 2017 Oct 9.
Transect surveys of hamlet communities (Hypoplectrus spp., Serranidae) covering 14 000 m across 16 reefs off La Parguera, Puerto Rico, are presented and compared with a previous survey conducted in the year 2000. The hamlet community has noticeably changed over 17 years, with a > 30% increase in relative abundance of the yellowtail hamlet Hypoplectrus chlorurus on the inner reefs at the expense of the other hamlet species. The data also suggest that the density of H. chlorurus has declined and that its distribution has shifted towards shallower depths. Considering that H. chlorurus has been previously identified as one of the few fish showing a positive association with seawater turbidity on the inner reefs of La Parguera and that sedimentation of terrestrial origin has increased over recent decades on these reefs, it is proposed that turbidity may constitute an important but so far overlooked ecological driver of hamlet communities.
本文展示了对波多黎各拉帕尔古拉附近16个珊瑚礁上的哈姆雷特群落（Hypoplectrus属，鮨科）进行的横断面调查，调查范围达14000米，并将其与2000年进行的一次先前调查进行了比较。在17年的时间里，哈姆雷特群落发生了显著变化，内礁上的黄尾哈姆雷特（Hypoplectrus chlorurus）相对丰度增加了30%以上，其他哈姆雷特物种的数量则相应减少。数据还表明，绿尾哈姆雷特的密度有所下降，其分布已向较浅深度转移。鉴于绿尾哈姆雷特此前被确定为少数几种与拉帕尔古拉内礁海水浊度呈正相关的鱼类之一，且近几十年来这些珊瑚礁上陆源沉积物的沉降有所增加，因此有人提出，浊度可能是哈姆雷特群落一个重要但迄今被忽视的生态驱动因素。
