| 标题: Constancy despite variability: Local and regional macrofaunal diversity in intertidal seagrass beds |
| 作者: Boye, A (Boye, Aurelien); Legendre, P (Legendre, Pierre); Grall, J (Grall, Jacques); Gauthier, O (Gauthier, Olivier) |
| 来源出版物: JOURNAL OF SEA RESEARCH 卷: 130 特刊: SI 页: 107-122 DOI: 10.1016/j.seares.2017.06.004 出版年: DEC 2017 |
| 摘要: The importance of seagrass habitat for the diversity of benthic fauna has been extensively studied worldwide. Most of the information available is, however, about a diversity while little consideration has been given to 13 diversity. To fill the knowledge gaps regarding the variability of epifaunal and infaunal seagrass assemblages at large spatial and temporal scales, we scrutinized an extensive dataset covering five years of monitoring of eight intertidal Zostera marina meadows around Brittany (France). High species richness arose at the regional scale from the combination of high local diversity of the meadows and substantial among-meadows 13 diversity. Epifauna and infauna appeared as distinct self-communities as they displayed different spatial and temporal patterns and varied in their responses to local hydrological conditions. Infauna had higher total 13 diversity than epifauna due to a tighter link to the great variability of local environmental conditions in the region. Both exhibited substantial variations in species composition and community structure with variations of dominant species that were accompanied by extensive change in numerous rare species. The dominant epifaunal species were all grazers. Changes in species composition were induced mostly by species replacement and rarely by richness differences between meadows. Indeed, species richness remained within a narrow range for all seagrass beds, suggesting a potential carrying capacity for species richness of the meadows. Overall, all meadows contributed equally to the regional turnover of seagrass macrofauna, emphasizing high variability and complementarity among beds at the regional scale. The implications of this substantial within-seagrass variability for the functioning of benthic ecosystems at broad scale and for conservation purposes in habitat mosaics warrant further investigations but our results clearly advocate taking into account within-habitat variation when evaluating the diversity of benthic habitats and the potential effect of habitat loss. |
| 入藏号: WOS:000419410100010 |
| 会议名称: 15th International Symposium of Oceanography of the Bay of Biscay (ISOBAY) |
| 会议日期: JUN 22-24, 2016 |
| 会议地点: Bilbao, SPAIN |
| 作者关键词: Beta diversity; Epifauna/infauna; Habitat loss; Richness capacity; Monitoring scale; Zostera marina |
| KeyWords Plus: EELGRASS ZOSTERA-MARINA; PRESENCE-ABSENCE DATA; BETA-DIVERSITY; FUNCTIONAL DIVERSITY; SPECIES RICHNESS; STRUCTURAL COMPLEXITY; SPATIAL VARIATION; BENTHIC INVERTEBRATES; SECONDARY PRODUCTION; COMMUNITY STRUCTURE |
| 地址: [Boye, Aurelien; Grall, Jacques; Gauthier, Olivier] Univ Bretagne Occidentale, Inst Univ Europeen Mer, UMR CNRS UBO IRD IFREMER 6539, Lab Sci Environm Marin LEMAR, F-29280 Plouzane, France. |
[Boye, Aurelien; Legendre, Pierre] Univ Montreal, Dept Sci Biol, CP 6128,Succursale Ctr Ville, Montreal, PQ H3C 3J7, Canada.
[Grall, Jacques; Gauthier, Olivier] Univ Bretagne Occidentale, Inst Univ Europeen Mer, UMS CNRS 3113, Observ Marin, F-29280 Plouzane, France.
| 研究方向: Marine & Freshwater Biology; Oceanography |