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首页> 外文期刊>Marine ecology progress series >Aggregations of brittle stars can perform similar ecological roles as mussel reefs
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Aggregations of brittle stars can perform similar ecological roles as mussel reefs

机译：脆性恒星的聚集体可以起到与贻贝礁相似的生态作用

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摘要

Biogenic habitats, such as coral reefs, facilitate diverse communities. In aquatic systems, aggregations of mobile benthic species may play a similar ecological role to that of typically sessile biogenic habitats; however, this has rarely been considered. We quantified the abundance of sessile horse mussels Modiolus modiolus and aggregating brittle stars Ophiothrix fragilis and tested for correlations between the density of mussels (live and dead) and brittle stars each with (1) abundance, biomass, diversity, and assemblage structure of associated benthic macrofauna; and (2) percent organic matter of the sediment. We found that the abundance of live M. modiolus was positively associated with the abundance and biomass of macrofauna. The positive association between M. modiolus and macrofaunal abundance was further amplified with an increase in brittle stars and a decrease in dead mussel shells. Macrofaunal biomass was lower with a higher percentage of dead mussel shells, and macrofaunal diversity increased with greater abundances of live M. modiolus and brittle stars. Sediment organic matter was positively related to brittle star density, but not to the abundance of live or dead mussels. The positive relationship between brittle stars and sediment organic matter suggests that brittle stars could enhance rates of benthic-pelagic coupling. Given the importance of understanding the functional role of threatened habitats, it is essential that the underlying community patterns be understood through robust observational studies to then derive testable hypotheses to determine drivers. These findings provide novel insight into the ecological role of aggregations of mobile species, which is essential to prioritize conservation and restoration strategies.
机译：珊瑚礁等生物栖息地为多样化的社区提供了便利。在水生系统中，活动底栖生物的聚集可能与典型的无柄生物源生境起着相似的生态作用。但是，这很少被考虑。我们量化了无柄马贻贝Modiolus modiolus和聚集的脆性星星Ophiothrix fragilis的丰度，并测试了贻贝（活的和死的）和脆性星星之间的相关性，每个都具有（1）丰度，生物量，多样性和相关底栖动物的聚集结构大型动物（2）沉积物中有机物的百分比。我们发现，活的M. modiolus的丰度与大型动物的丰度和生物量呈正相关。随着脆性恒星的增加和贻贝死壳的减少，进一步增强了孟菲斯分枝杆菌与大型动物丰度之间的正向联系。大型动物的生物量较低，贻贝死壳的百分比更高，大型动物的多样性随着活mo鼠和易碎恒星的丰度增加而增加。沉积物有机物与脆性恒星密度呈正相关，但与活或死贻贝的丰度却没有正相关。脆性恒星与沉积物有机质之间的正相关关系表明，脆性恒星可以提高底栖-浮游耦合速率。鉴于了解受威胁生境的功能作用的重要性，至关重要的是，必须通过强大的观察研究来了解潜在的社区格局，然后得出可检验的假设来确定驱动因素。这些发现为流动物种聚集的生态作用提供了新颖的见解，这对于确定保护和恢复战略的优先次序至关重要。

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  • 来源
    《Marine ecology progress series》 |2017年第20期|157-167|共11页
  • 作者

    Geraldi Nathan R.; Bertolini Camilla; Emmerson Mark C.; Roberts Dai; Sigwart Julia D.; OConnor Nessa E.;

  • 作者单位

    Queens Univ, Marine Lab, 12-13 Strand, Portaferry BT22 1PF, North Ireland|Queens Univ Belfast, Inst Global Food Secur, Sch Biol Sci, 97 Lisburn Rd, Belfast BT9 7BL, Antrim, North Ireland|King Abdullah Univ Sci & Technol, Red Sea Res Ctr, Thuwal, Saudi Arabia;

    Queens Univ, Marine Lab, 12-13 Strand, Portaferry BT22 1PF, North Ireland|Queens Univ Belfast, Inst Global Food Secur, Sch Biol Sci, 97 Lisburn Rd, Belfast BT9 7BL, Antrim, North Ireland;

    Queens Univ, Marine Lab, 12-13 Strand, Portaferry BT22 1PF, North Ireland|Queens Univ Belfast, Inst Global Food Secur, Sch Biol Sci, 97 Lisburn Rd, Belfast BT9 7BL, Antrim, North Ireland;

    Queens Univ, Marine Lab, 12-13 Strand, Portaferry BT22 1PF, North Ireland|Queens Univ Belfast, Inst Global Food Secur, Sch Biol Sci, 97 Lisburn Rd, Belfast BT9 7BL, Antrim, North Ireland;

    Queens Univ, Marine Lab, 12-13 Strand, Portaferry BT22 1PF, North Ireland|Queens Univ Belfast, Inst Global Food Secur, Sch Biol Sci, 97 Lisburn Rd, Belfast BT9 7BL, Antrim, North Ireland;

    Queens Univ, Marine Lab, 12-13 Strand, Portaferry BT22 1PF, North Ireland|Queens Univ Belfast, Inst Global Food Secur, Sch Biol Sci, 97 Lisburn Rd, Belfast BT9 7BL, Antrim, North Ireland;

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  • 正文语种 eng
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  • 关键词

    Foundation species; Reef; Benthic-pelagic coupling; Biogenic habitat; Brittle star; Bivalve; Organic matter; Ophiuroids;

    机译：基础物种;礁;底栖-上层耦合;生物生境;脆性星;双壳类;有机物;蛇骨类;

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