Predation and anthropogenic impact on community structure of boulder beaches

被引:10
作者
Aldana, Marcela [1 ]
Maturana, Diego [2 ]
Pulgar, Jose [2 ]
Garcia-Huidobro, M. Roberto [1 ]
机构
[1] Univ Santo Tomas, Fac Ciencias, CiiCC, Ejercito 146, Santiago 8370003, Chile
[2] Univ Andres Bello, Fac Ecol & Recursos Nat, Dept Ecol & Biodiversidad, Republ 470,Piso 3, Santiago, Chile
关键词
Management and Exploitation Areas for Benthic Resources; intertidal zone; boulder beaches; community structure; food web; ROCKY INTERTIDAL ZONE; CENTRAL CHILE; SCARTICHTHYS-VIRIDIS; HABITAT STRUCTURE; PATCH SIZE; PATTERNS; DISTURBANCE; ORGANIZATION; ASSEMBLAGES; PERSISTENCE;
D O I
10.3989/scimar.04444.27A
中图分类号
Q17 [水生生物学];
学科分类号
071004 ;
摘要
Predator impacts on intertidal community structure have been studied for rocky platforms, but intertidal boulder fields, a habitat with a greater extension and heterogeneity, have not yet been considered. Keeping in mind that disturbances are considered an important force in determining intertidal habitat diversity, the aims of this work were to describe and quantify boulder field community structure and to assess boulder field community dynamics by proposing possible food webs, taking into consideration predatory and anthropogenic impacts. These aims were achieved by installing predator-exclusion cages outfitted with rocks that were monitored monthly over one year in two study zones, a Management and Exploitation Area for Benthic Resources (MEABR, Playa Chica) and open-access area (OAA, Playa Grande). For both study zones, juveniles were the dominant observed ontogenetic state and invertebrate richness and density were higher inside exclusion cages. Furthermore, the MEABR had a differentiated impact on community structure and dynamics in comparison with the OAA. In conclusion, the roles played by boulder fields in intertidal diversity, especially in recruitment and as a nursery zone, are important to consider in management plans.
引用
收藏
页码:543 / 551
页数:9
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