Indirect effects of species interactions on habitat provisioning.
Indirect effects of species interactions on habitat provisioning.
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物种相互作用对栖息地提供的间接影响。
DOI：
10.1007/s00442-011-1912-5
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发表时间：
2011-07
期刊：
影响因子：
2.7
通讯作者：
Brooks, Andrew J.
中科院分区：
文献类型：
--
作者：
Holbrook, Sally J.;Schmitt, Russell J.;Brooks, Andrew J.
关键词：
栖息在生物栖息地的物种可以影响它们的避难所，反过来，在塑造当地的生物多样性模式方面发挥重要作用。在这里，我们探索了形成栖息地的分支珊瑚及其相关鱼类的供应率之间的正反馈循环，并展示了两组鱼类（食浮游生物的雀鲷和掠夺性的鹰鱼）之间的相互作用如何改变反馈。一项实地实验证实，分支珊瑚（属Pocillopora）的骨骼生长大幅增加的居民鱼的数量（生物量），可能是因为他们大大增加了营养物质的间隙浓度。因为有一个群体的大小和数量（生物量）的相关鱼类（主要是雀鲷科）之间的正相关关系，结构-功能反馈回路存在，其中越来越多的雀鲷增强珊瑚生长和较大的珊瑚宿主更大的丰度（和物种丰富度）的鱼。然而，豆娘鱼和弧眼鹰鱼之间的相互作用，一个主要是孤独的居民，可以破坏这个正反馈回路。实地调查显示了一个明显的模式，鱼类占用有关的珊瑚大小：Pocilloppora殖民地的大小足以容纳鱼类（>40厘米周长）有要么组雀鲷或弧眼鹰鱼;只有较大的殖民地（>75厘米）被雀鲷和鹰鱼占领。随后的短期和长期实验表明，在中等大小的Pocillopora殖民地，弧眼hawkfish阻止建立雀鲷抑制他们的招聘。宿主珊瑚的人口后果是巨大的，在一个为期一年的实验中，中型Pocillopora被hawkfish占据的增长率的一半的珊瑚，主办组的雀鲷。这些调查结果表明：（1）占据生物栖息地的物种可以提高其栖息地的供应率;（2）群落结构和生态系统功能之间的这种正反馈可以被强相互作用者破坏;（3）即使对生态系统过程产生的实质性后果也很难辨别。
Species that shelter in a biogenic habitat can influence their refugia and, in turn, play an essential role in shaping local patterns of biodiversity. Here we explore a positive feedback loop between the provisioning rate of habitat-forming branching corals and their associated fishes and show how interactions between two groups of fish—the planktivorous damselfish and predatory hawkfish—altered the feedback. A field experiment confirmed that skeletal growth of branching coral (genus Pocillopora) increased substantially with increasing numbers (biomass) of resident fishes, likely because they greatly increased the interstitial concentrations of nutrients. Because there is a positive relationship between colony size and number (biomass) of associated fishes (primarily damselfishes in the Family Pomacentridae), a structure–function feedback loop exists in which increasing numbers of damselfish enhance coral growth and larger corals host greater abundances (and species richness) of fish. However, interactions between damselfishes and arc-eye hawkfish, Paracirrhites arcatus, a largely solitary resident, can disrupt this positive feedback loop. Field surveys revealed a marked pattern of fish occupancy related to coral size: Pocillopora colonies of sufficient size to host fish (>40 cm circumference) had either groups of damselfish or an arc-eye hawkfish; only larger colonies (>75 cm) were occupied by both the damselfish and hawkfish. Subsequent short- and long-term experiments revealed that on intermediate-sized Pocillopora colonies, arc-eye hawkfish prevented the establishment of damselfish by suppressing their recruitment. The demographic consequences to the host coral were substantial; in a 1-year-long experiment, intermediate-size Pocillopora occupied by hawkfish grew at half the rate of corals that hosted groups of damselfish. These findings indicate that: (1) species which occupy a biogenic habitat can enhance the provisioning rate of their habitat; (2) such positive feedbacks between community structure and ecosystem function can be disrupted by a strong interactor; (3) even substantial consequences on ecosystem processes that arise can be difficult to discern.
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DOI：
10.1111/j.1442-9993.1990.tb01473.x
发表时间：
1990-12-01
期刊：
AUSTRALIAN JOURNAL OF ECOLOGY
影响因子：
--
作者：
HOLBROOK, SJ;SCHMITT, RJ;AMBROSE, RF
通讯作者：
AMBROSE, RF
影响因子：
2.7
作者：
Anderson, B;Midgley, JJ
通讯作者：
Midgley, JJ
影响因子：
2.7
作者：
Holbrook, SJ;Forrester, GE;Schmitt, RJ
通讯作者：
Schmitt, RJ
影响因子：
8.8
作者：
Gross, Kevin
通讯作者：
Gross, Kevin
影响因子：
4.8
作者：
Cahill, James F., Jr.;Elle, Elizabeth;Shore, Bryon H.
通讯作者：
Shore, Bryon H.