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Tropical saltmarshes are important to juvenile fiddler crabs but not as refuges from large predators or high temperatures.
Marine Environmental Research ( IF 3.3 ) Pub Date : 2020-08-31 , DOI: 10.1016/j.marenvres.2020.105133
Alice Reis 1 , Francisco Barros 2
Affiliation  

Tropical saltmarshes' role as a refuge for macrofauna is poorly known. We tested the hypotheses that: i) there is an increase in abundance of early life-stages of fiddler crabs associated with an increase in vegetation density (thermal and/or predation refuge) and ii) predation are lower within saltmarsh vegetation. The abundance of early life-stages increased with both vegetation density and temperature. Megalopa and juveniles might be adapted or benefit from high temperatures found on tropical saltmarshes and thus do not need protection from it. Predation was higher in saltmarshes than in nearby non-vegetated areas, thus tropical saltmarshes can not be considered a refuge from relatively large predators for juveniles of fiddler crabs. Although not offering refuge against temperature and predation, tropical saltmarshes are important habitats for the recruitment of early life-stages of fiddler crabs. Future studies should consider the evaluation of tropical saltmarsh hydrodynamics in the settlement and permanence of juveniles.



中文翻译:

热带盐沼对幼小提琴蟹很重要,但不是大型食肉动物或高温的避难所。

热带盐沼作为大型动物保护区的作用鲜为人知。我们检验了以下假设:i)提琴蟹早期生命期的增加与植被密度(热和/或捕食避难所)的增加相关; ii)盐沼植被中的捕食度较低生命早期的丰度随着植被密度和温度的升高而增加。巨人和幼鱼可能适应了热带盐沼中发现的高温或从中受益,因此不需要保护。盐沼的捕食活动比附近的无植被地区要高,因此热带盐沼不能被认为是大提琴蟹幼体的相对大型捕食者的避难所。尽管不提供温度和捕食的避难所,但热带盐沼还是招募提琴蟹早期生命阶段的重要栖息地。未来的研究应考虑对热带盐沼水动力在青少年定居和持久性方面的评估。

更新日期:2020-08-31
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