TheRedTentacle

TheRedTentacle

The hunt for coding numbers, flying satellites and underwater housings.

"Biology is just a branch of thermodynamics" the history of life is just a "gradual systematic development toward more efficient ways of degrading energy" | Thomas Gold

As Florestas Marinhas

The Portuguese forests of kelp (e-book, portuguese only)

Forthcoming

Tropicalization of fish assemblages at temperate biogeographic transition zones.

Biogeographic transition zones in marine temperate systems are often hotspots of biodiversity with high levels of resilience to short-term climate shifts due to naturally occurring cyclic oscillations of oceanographic conditions. However, these environments are likely vulnerable to a steady warming scenario when cyclical conditions are disrupted. In this paper we evaluate how changes in local oceanography affect the structure of rocky reef fish assemblages over a period of 50 yr in a biogeographic transition zone. Using a 12 yr time series of rocky reef fish assemblage structure, we identified the set of oceanographic variables that most influenced assemblage dynamics. Descriptive and predictive models (multivariate regression trees) were compared to observed data using the area under the curve. Winter northward wind stress and sea surface temperature (SST) were the most important drivers of change in assemblage structure.

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Running through the ages [ ! ]

Running through the ages [ ! ]

It seems like the high intertidal P. canaliculata has gone under an extensive biogeographical shift.
Assuming species/climate equilibrium, our models and molecular variation supported the hypothesis of a post-glacial latitudinal range shift for P. canaliculata. In Iberia the low haplotypic diversity suggested complex range dynamics that are not fully captured by our projections for past times. Periglacial regions, identified as the source of poleward colonization, were inferred to have been comparatively more stable. Greater attention should be paid to marine range dynamics at low-latitude range margins, particularly in genetically structured low-dispersal species exhibiting southern endemic variation. 
Continue your readings

It seems like the high intertidal P. canaliculata has gone under an extensive biogeographical shift.

Assuming species/climate equilibrium, our models and molecular variation supported the hypothesis of a post-glacial latitudinal range shift for P. canaliculata. In Iberia the low haplotypic diversity suggested complex range dynamics that are not fully captured by our projections for past times. Periglacial regions, identified as the source of poleward colonization, were inferred to have been comparatively more stable. Greater attention should be paid to marine range dynamics at low-latitude range margins, particularly in genetically structured low-dispersal species exhibiting southern endemic variation. 

Continue your readings