کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4470127 1314391 2011 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Non-native marine invertebrates are more tolerant towards environmental stress than taxonomically related native species: Results from a globally replicated study
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست بهداشت، سم شناسی و جهش زایی
پیش نمایش صفحه اول مقاله
Non-native marine invertebrates are more tolerant towards environmental stress than taxonomically related native species: Results from a globally replicated study
چکیده انگلیسی

To predict the risk associated with future introductions, ecologists seek to identify traits that determine the invasiveness of species. Among numerous designated characteristics, tolerance towards environmental stress is one of the most favored. However, there is little empirical support for the assumption that non-native species generally cope better with temporarily unfavorable conditions than native species. To test this concept, we ran five pairwise comparisons between native and non-native marine invertebrates at temperate, subtropical, and tropical sites. We included (natives named first) six bivalves: Brachidontes exustus and Perna viridis, P. perna and Isognomon bicolor, Saccostrea glomerata and Crassostrea gigas, two ascidians: Diplosoma listerianum and Didemnum vexillum as well as two crustaceans: Gammarus zaddachi and G. tigrinus. We simulated acute fluctuations in salinity, oxygen concentration, and temperature, while we measured respiration and survival rates. Under stressful conditions, non-native species consistently showed less pronounced deviations from their normal respiratory performance than their native counterparts. We suggest that this indicates that they have a wider tolerance range. Furthermore, they also revealed higher survival rates under stress. Thus, stress tolerance seems to be a property of successful invaders and could therefore be a useful criterion for screening profiles and risk assessment protocols.


► Non-native species showed higher survival rates in the face of stress than native.
► Respiratory performance under stress was closer to normal in non-native species.
► Strong evidence for stress tolerance as a general trait of non-native species.
► Robust results due to a global-scale, modular experimental approach.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Research - Volume 111, Issue 7, October 2011, Pages 943–952
نویسندگان
, , , , , , , , , , , ,