Spatial competition among clonal organisms in extant and selected paleozoic reef communities

Fagerstrom, J. A.; West, Ronald R.; Kershaw, Stephen; Cossey, P. J.

doi:10.1007/bf02562563

Cited by 26 publications

(29 citation statements)

References 80 publications

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“…Obviously, careful and detailed study of the early post-larval skeletal mass of a hypercalciWed sponge is important in making a correct interpretation. Commonly this is diYcult, if not impossible, in fossil forms, but closely spaced serial sections may provide additional insight (Fagerstrom et al 2000). It should also be noted that viable interpretation of fusion and Wssion in extant hypercalciWed sponges is also diYcult because virtually nothing is known of their reproductive history and early growth (number of propagules, etc.)…”

Section: Spongesmentioning

confidence: 99%

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Biological interactions among extant and fossil clonal organisms

West

McKinney

Fagerstrom

et al. 2010

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Section: Spongesmentioning

confidence: 99%

“…Until these edges actually fuse, this situation might be viewed as Wssion or spatial competition (i.e., stand-oV) even when the point of origin of the clone is clearly observed. In some live-live competitive stand-oV interactions, the clonal margins maintain a, more or less, constant distance between them (Fagerstrom et al 2000).…”

Section: Types Of Interactionsmentioning

confidence: 99%

Biological interactions among extant and fossil clonal organisms

West

McKinney

Fagerstrom

et al. 2010

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“…12); (2) self-overgrowth (Lee and Noble 1990, fig. 1; Kidwell and Gyllenhaal 1998;Fagerstrom et al 2000); (3) fusion of juxtaposed clones (Figs. 1,2,3,4,5,6,7,8); and (4) quasi-fusion of poorly organized, dense masses of stems in dendroidal algae, sponges (Fig.…”

Section: Biotic Factorsmentioning

confidence: 99%

“…Most previous studies of live-live interactions in reef communities have emphasized heterospecific spatial competition (Lang 1971(Lang , 1973Jackson 1977;Buss 1986;Lang and Chornesky 1990;McKinney 1992;Fagerstrom et al 2000;Taylor and Wilson 2003). Among live reef-building Table 1 Annual percentages of live substrate cover (cf.…”

Section: Introductionmentioning

confidence: 99%

Roles of clone–clone interactions in building reef frameworks: principles and examples

Fagerstrom

West

2010

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In living and fossil reefs, rapid upward clone growth provides positive topographic relief; the skeletal framework provides rigidity. Clonal organisms have been the chief frame-builders during most of the Phanerozoic; large clone size, growth habit, growth form, and arrangement of these clones in the framework result from rapid growth rates. Dense skeletal packing enhances rigidity and results in live-live interactions between juxtaposed clones. These interactions are both heterospecific and conspecific; the former mostly involve spatial competition whereas the latter involve clone fusion, self-overgrowth, and fission. We describe three types of fusion: (a) inter-clone fusion of two or more clones, each from a separate propagule; (b) intra-clone fusion of parts of the same clone having its origin from a single propagule; it includes recovery from partial clone degradation and self-overgrowth; (c) quasifusion between a live bud/polyp/zooid and a dead part (stem; branch) of the same or a different clone, i.e., a livedead association.

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“…Sponge assemblages are influenced by a number of physical factors including: depth [43][44][45]; water flow [44,46]; temperature [26,47]; light intensity [48]; sedimentation [49][50][51][52] and salinity [26,53,54]. Biological factors influencing sponge assemblages include: predation [55][56][57][58]; mutualistic and symbiotic associations [59][60][61]; concentration and plankton diversity [62][63][64]; spatial competition [65][66][67]; and disease [68][69][70][71]. There has been some discussion regarding the relative roles of biological and physical factors in controlling sponge assemblages in different geographic regions.…”

Section: Introductionmentioning

confidence: 99%

Spatial Variability of Sponge Assemblages on the Wellington South Coast,New Zealand

Berman¹

2010

TOMBJ

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Abstract:The aim of this study was to provide baseline data for sponge biodiversity on the Wellington South Coast, New Zealand. Eighteen sites were qualitatively sampled resulting in the identification of 65 different sponge taxa. Forty-three of these species were also reported from a quantitative survey of three vertical wall sites in 8-10m depth conducted as part of a long-term monitoring study. All three sites had a similar mean number of species per quadrat, however, the percentage cover of sponges and sponge density varied significantly between sites. ANOSIM showed that all three sites were significantly different from each other (P<0.001), which is likely the result of differences in environmental conditions. The Wellington South Coast has a diverse sponge assemblage, which is atypically dominated by calcareous species of the genus Clathrina. This appears to be unusual for New Zealand, and although the reasons for this situation are unknown, we hypothesise that this situation is explained by the low levels of nutrients on the Wellington South Coast, allowing calcareous sponges to proliferate at the expense of the demosponges.

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Spatial competition among clonal organisms in extant and selected paleozoic reef communities

Cited by 26 publications

References 80 publications

Biological interactions among extant and fossil clonal organisms

Biological interactions among extant and fossil clonal organisms

Roles of clone–clone interactions in building reef frameworks: principles and examples

Spatial Variability of Sponge Assemblages on the Wellington South Coast,New Zealand

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