| 1. |
- Aurelle, D., et al.
(författare)
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Biodiversity, climate change, and adaptation in the Mediterranean
- 2022
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Ingår i: Ecosphere. - : Wiley. - 2150-8925. ; 13:4
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Tidskriftsartikel (refereegranskat)abstract
- Potential for, and limits to, adaptation to environmental changes are critical for resilience and risk mitigation. The Mediterranean basin is a mosaic of biodiversity-rich ecosystems long affected by human influence, whose resilience is now questioned by climate change. After reviewing the different components of biological adaptation, we present the main characteristics of marine and terrestrial biodiversity in the Mediterranean basin and of the pressures they face. Taking climatic trends into consideration, we discuss the adaptive potential of a range of ecosystems dominated by species without active dispersal. We argue that the high heterogeneity of Mediterranean landscapes and seascapes constitutes a laboratory for the study of adaptation when environmental conditions change rapidly and may provide opportunities for adaptation and adaptability of species and ecosystems. Adaptive management in the Mediterranean can and should harness the nature-based solutions offered by both ecological and evolutionary processes for increasing the resilience of ecosystems to climate change.
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| 2. |
- Weber, A, et al.
(författare)
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Thermotolerance and regeneration in the brittle star species complex Ophioderma longicauda: a preliminary study comparing lineages and Mediterranean basins
- 2013
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Ingår i: Comptes rendus. Biologies. - : Elsevier BV. - 1631-0691. ; 336:11/12, s. 572-581
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Tidskriftsartikel (refereegranskat)abstract
- Global warming is expected to change marine species distributions; it is thus critical to understand species current thermotolerance. The brittle star species complex Ophioderma longicauda comprises a broadcast spawning lineage L1 and a brooding lineage L3. We collected L1 specimens from Marseilles and Crete, and L3 specimens from Crete. We monitored survival, autotomy and arm regeneration at 17, 26 and 30 °C during 14 weeks. Globally O. longicauda showed good resistance to elevated temperatures compared to other published studies on ophiuroids. The L3 sample displayed a better thermotolerance than L1 samples. Yet, more research is needed to establish whether these differences are due to lineages, geographic origin, or random effects. We provided for the first time individual regeneration trajectories, and showed that regeneration followed a growth curve and was highly influenced by temperature in both lineages. Our results highlight the importance of taking into account the presence of cryptic species when studying the potential effects of global warming.
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| 3. |
- Rossi, V, et al.
(författare)
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Small-scale connectivity of coralligenous habitats: insights from a modeling approach within a semi-opened Mediterranean bay
- 2020
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Ingår i: Vie et milieu. - 0240-8759. ; 70:3-4, s. 161-174
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Tidskriftsartikel (refereegranskat)abstract
- Habitat connectivity is central to several key evolutionary and ecological pro- cesses, having implications for the spatial structuring of marine populations. For benthic species that have no or little mobility as adults, connectivity is evaluated by analyzing the dispersal of propagules across the seascape. We investigate fine-scale connectivity of coralligenous habitats in Marseille Bay (located in the north-western Mediterranean Sea) using high-resolution cartog- raphy and a particle-tracking model ran over a range of parameters derived from the biological traits of potential target species. We present annual and seasonal means of various connectivity diagnostics measuring the retention and exchange of propagules among coralligenous patches. A synthetic view is obtained by clustering individual patches into “coralligenous provinces” (ensemble of patches tightly connected by ocean currents). When discussing our results against historical observations, we highlight some genetic breaks, sharp community changes and eco- logical clusters that fit well our simulated connectivity patterns. Consistent findings include reduced biodiversity along Côte Bleue, high biodiversity at Planier Island and the presence of various dispersal barriers, which evolve with dispersal durations and provide the backbone of habitat connectivity. Our results help to apprehend and test hypothesis on marine population structures, providing useful information for ecologists and conservationists.
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