Chemically mediated behavior of recruiting corals and fishes: A tipping point that may limit reef recovery
Chemically mediated behavior of recruiting corals and fishes: A tipping point that may limit reef recovery
复制标题
化学介导的珊瑚和鱼类招募行为：可能限制珊瑚礁恢复的临界点
作者：
D. Dixson;D. Abrego;M. Hay
珊瑚和珊瑚鱼选择好的家园年轻的动物往往分散到新的栖息地。我们能否利用保护区内的种群来殖民附近正在恢复或过度使用的栖息地？Dixson等人表明，分散的幼年珊瑚和珊瑚鱼绝大多数被健康的珊瑚礁所吸引，但被定居在退化珊瑚礁上的海藻所排斥（见Bruno的观点）。因此，即使是在选择栖息地时表现出被动的物种，也可能比我们想象的更有偏好。《科学》，本期第892页;另见第879页，幼年珊瑚和珊瑚鱼被健康珊瑚礁的化学信号所吸引，阻止它们在退化地区定居。[Also全球珊瑚礁正在衰退，从珊瑚的主导地位转变为海藻的主导地位。一旦海藻变得丰富，珊瑚恢复受到抑制，除非食草动物返回清除海藻，然后珊瑚招募。鱼类和珊瑚恢复的差异尚不清楚。我们发现，珊瑚和鱼类的幼鱼被排斥的化学线索，从捕鱼，海藻为主的珊瑚礁，但吸引到珊瑚为主的地区，禁止捕鱼的线索。来自退化珊瑚礁的特定海藻的化学线索会排斥新兵，而来自健康珊瑚礁的典型珊瑚的线索则会吸引新兵。少年在场，但行为上避免招募退化的珊瑚礁为主的海藻。为了恢复，可能需要管理退化的珊瑚礁，以产生吸引而不是排斥珊瑚和鱼类的信号。
Corals and reef fish choose nice homes Young animals tend to disperse into new habitats. Can we use populations in protected areas to colonize nearby recovering or overused habitats? It seems that for corals and reef fish, the answer may be no. Dixson et al. show that dispersing juvenile corals and reef fish were overwhelmingly attracted to healthy reefs but were repelled by seaweeds that colonize degraded reefs (see the Perspective by Bruno). Thus, even species that appear passive in their choice of habitat may have stronger preferences than we thought. Science, this issue p. 892; see also p. 879 Juvenile corals and reef fish are attracted by chemical signals of healthy reefs, preventing settlement in degraded areas. [Also see Perspective by Bruno] Coral reefs are in global decline, converting from dominance by coral to dominance by seaweed. Once seaweeds become abundant, coral recovery is suppressed unless herbivores return to remove seaweeds, and corals then recruit. Variance in the recovery of fishes and corals is not well understood. We show that juveniles of both corals and fishes are repelled by chemical cues from fished, seaweed-dominated reefs but attracted to cues from coral-dominated areas where fishing is prohibited. Chemical cues of specific seaweeds from degraded reefs repulsed recruits, and cues from specific corals that are typical of healthy reefs attracted recruits. Juveniles were present at but behaviorally avoided recruiting to degraded reefs dominated by seaweeds. For recovery, degraded reefs may need to be managed to produce cues that attract, rather than repel, recruiting corals and fishes.
消费者多样性与猎物防御相互作用，推动生态系统功能。
影响因子：
4.8
作者：
Rasher,DouglasB;Hoey,AndrewS;Hay,MarkE
通讯作者：
Hay,MarkE