What about non-adaptive radiation?

Gittenberger, E.

doi:10.1111/j.1095-8312.1991.tb00598.x

Cited by 256 publications

(249 citation statements)

References 2 publications

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“…Adaptive radiations are generally more spectacular in the sense that diversification is quicker and accompanied by more pronounced phenotypic change in response to the environment (Kassen 2009;Glor 2010;Losos 2010). Of course, not all radiations must be adaptive: diversification could be driven primarily by vicariance without substantial ecological or phenotypic diversification (Gittenerger 1991;Kozak et al 2006;Rundell and Price 2009). Consistent with this, similarities in species distributions and population structure argue that differentiation of many endemic terrestrial vertebrates on Sulawesi was triggered by habitat fragmentation.…”

Section: Adaptive Radiationmentioning

confidence: 98%

Adaptive Radiation and Ecological Opportunity in Sulawesi and Philippine Fanged Frog (Limnonectes) Communities

Setiadi

McGuire

Brown

et al. 2011

The American Naturalist

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Because island communities are derived from mainland communities, they are often less diverse by comparison. However, reduced complexity of island communities can also present ecological opportunities. For example, amphibian diversity on Sulawesi Island is lower than it is in the Philippines, but Sulawesi supports a surprising diversity of Sulawesi fanged frogs (Limnonectes).Here we examine molecular, morphological, and geographical variation of fanged frogs from these two regions. Using genealogical concordance, morphology, and a Bayesian approach to species delimitation, we identified 13 species on Sulawesi, only four of which have been previously described. After evolutionary history is accounted for, a model with multiple body size optima in sympatric species is favored over a "random-walk" model of body size evolution. Additionally, morphological variation is higher among sympatric than nonsympatric species on Sulawesi but not in the Philippines. These findings suggest that adaptive radiation of fanged frogs on Sulawesi was driven by natural selection to infiltrate ecological niches occupied by other frog lineages in the Philippines. This supports a role of ecological opportunity in community assembly: diversification in mature communities, such as the Philippines, is limited by a dearth of unoccupied ecological niches. On Sulawesi, evolutionary novelties originated in a predictable and replicated fashion in response to opportunities presented by a depauperate ancestral community.

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Section: Adaptive Radiationmentioning

confidence: 98%

Adaptive Radiation and Ecological Opportunity in Sulawesi and Philippine Fanged Frog (Limnonectes) Communities

Setiadi

McGuire

Brown

et al. 2011

The American Naturalist

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“…Usually, in such isolated ecosystems, the probability of success of chance events of longdistance dispersal is quite low and the number of colonizers is usually small -the well-known "founder effect" (Mayr, 1954); as a consequence, a high variability is expected in species composition from archipelago to archipelago, and sometimes even between islands belonging to the same archipelago. Additionally, the profound isolation to which some of these populations are subjected may lead to genetic drift, speciation processes and the rise of endemisms by adaptive and non-adaptive radiation (Grant, 1981;Gittenberger, 1991;Vasconcelos et al, 2010), further contributing to this variability. The extreme isolation of many oceanic islands also subjects many populations to intense pressure, often on the verge of collapse, so when environmental conditions change rapidly many of these populations experience bottleneck effects, local disappearances, or even extinction (Carson, 1992;Ávila et al, 2008a,b).…”

Section: Biological Colonizationmentioning

confidence: 99%

Coastal evolution on volcanic oceanic islands: A complex interplay between volcanism, erosion, sedimentation, sea-level change and biogenic production

Ramalho¹,

Quartau

Trenhaile

et al. 2013

Earth-Science Reviews

153

147

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The growth and decay of oceanic hotspot volcanoes are intrinsically related to a competition between volcanic construction and erosive destruction, and coastlines are at the forefront of such confrontation. In this paper, we review the several mechanisms that interact and contribute to the development of coastlines on oceanic island volcanoes, and how these processes evolve throughout the islands' lifetime. Volcanic constructional processes dominate during the emergent island and subaerial shield-building stages. During the emergent island stage, surtseyan activity prevails and hydroclastic and pyroclastic structures form; these structures are generally ephemeral because they can be rapidly obliterated by marine erosion. With the onset of the subaerial shield-building stage, coastal evolution is essentially characterized by rapid but intermittent lateral growth through the formation of lava deltas, largely expanding the coastlines until they, typically, reach their maximum extension. With the post-shield quiescence in volcanic activity, destructive processes gradually take over and coastlines retreat, adopting a more prominent profile; mass wasting and marine and fluvial erosion reshape the landscape and, if conditions are favorable, biogenic processes assume a prominent role. Posterosional volcanic activity may temporarily reverse the balance by renewing coastline expansion, but islands inexorably enter in a long battle for survival above sea level. Reef growth and/or uplift may also prolong the island's lifetime above the waves. The ultimate fate of most islands, however, is to be drowned through subsidence and/or truncation by marine erosion.Keywords complex, interplay, between, volcanism, erosion, sedimentation, sea, level, islands, change, coastal, biogenic, production, oceanic, evolution, volcanic, GeoQuest Disciplines Medicine and Health Sciences | Social and Behavioral Sciences Publication DetailsRamalho, R. S., Quartau, R., Trenhaile, A. S., Mitchell, N. C., Woodroffe, C. D. & Avila, S. P. (2013). Coastal evolution on volcanic oceanic islands: a complex interplay between volcanism, erosion, sedimentation, sealevel change and biogenic production. Earth-Science Reviews, 127 140-170. AbstractThe growth and decay of oceanic hotspot volcanoes are intrinsically related to a competition between volcanic construction and erosive destruction, and coastlines are at the forefront of such confrontation. In this paper, we review the several mechanisms that interact and contribute to the development of coastlines on oceanic island volcanoes, and how these processes evolve throughout the islands' lifetime. Volcanic constructional processes dominate during the emergent island and subaerial shield-building stages. During the emergent island stage, surtseyan activity prevails and hydroclastic and pyroclastic structures form; these structures are generally ephemeral because they can be rapidly obliterated by marine erosion. With the onset of the subaerial shield-building stage, coastal evolution is essentially ch...

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“…In the Aegean (Mylonas et al, 2004), and in the Kimberley region of Western Australia (Solem 1988(Solem , 1991Solem and McKenzie, 1991;Cameron, 1992), much of the difference between localities is accounted for by allopatric replacement by congeners: local "non-adaptive" radiations (Gittenberger, 1991). These tend to be concentrated amongst larger species with rather specific environmental requirements: Camaenidae in the Kimberley, Clausiliidae (Albinaria), Enidae (Mastus) and some Helicoidea in the Aegean.…”

Section: Patterns and Processesmentioning

confidence: 99%

Geographical variation in the composition and richness of forest snail faunas in northern Europe

Pokryszko¹,

Cameron²

2005

Rec West Aust Mus Sup

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-The forest snail fauna of northern Europe originated from postglacial colonization from the south. While it is regionally poor (c. 150 species, excluding slugs), individual localities (clusters of sample sites within a few km of each other) can be rich by global standards (up to 57 species). Distance decay in faunal similarity is very gradual in lowland regions, but Carpathian faunas are sharply differentiated, and hold the most endemics. British faunas are remarkably uniform. Very little of this differentiation is due to congeneric replacement; it results mostly from shifts in the richness of whole families. Clausiliids in particular predominate in the Carpathians and adjacent areas, but this is not reflected in the apparent density of individuals: as species richness increases, average abundance of each declines. In general, small species are more Widely distributed than large ones. Although the richest localities are found in the Carpathians, regional variation in local richness is slight. Substrate has Significant effects: oligotrophic areas have poorer and more locally variable faunas. At a slightly larger scale, areas of less than 100 km 2 holding more than 60 species can be found in many parts of the region (even more when slugs are included); the richest such patches hold about half the whole regional forest fauna. Comparison with limited data from regions further south shows that although they have much richer regional faunas, local communities are no richer than those of the north. Distance decay is much more rapid. These results are discussed, with global comparisons, in terms of the ways in which molluscan communities are assembled and structured.

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What about non-adaptive radiation?

Cited by 256 publications

References 2 publications

Adaptive Radiation and Ecological Opportunity in Sulawesi and Philippine Fanged Frog (Limnonectes) Communities

Adaptive Radiation and Ecological Opportunity in Sulawesi and Philippine Fanged Frog (Limnonectes) Communities

Coastal evolution on volcanic oceanic islands: A complex interplay between volcanism, erosion, sedimentation, sea-level change and biogenic production

Geographical variation in the composition and richness of forest snail faunas in northern Europe

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