Species richness in marine benthic habitats through the Phanerozoic

  title={Species richness in marine benthic habitats through the Phanerozoic},
  author={Richard K. Bambach},
  • R. Bambach
  • Published 1 April 1977
  • Biology
  • Paleobiology
The distribution of numbers of species and the median number of species from 386 selected fossil communities are tabulated for high stress, variable nearshore, and open marine environments during the Lower, Middle, and Upper Paleozoic, the Mesozoic and the Cenozoic. The number of species always increases from high stress to variable nearshore to open marine environments. Within-habitat variation in number of species is small for long intervals of the Phanerozoic. The median number of species in… 
Using field data and literature sources from Laurentia, it is shown that genus richness in well-preserved subtidal macrobenthic marine communities increased by as much as a factor of two from the Middle Cambrian to the Late Ordovician.
Species richness in the Phanerozoic; an investigation of sampling effects
-Given estimates of the variation in total standing species richness through the periods of the Phanerozoic, mean species duration, and the relative intensity of the sampling of the fauna from each
Cambrian to Cretaceous changes in hardground communities
The changing nature of the communities of boring and encrusting taxa found on upward-facing hard-grounds has been studied from the standpoints of (a) diversity, (b) faunal composition, and (c) nature
Recovery of benthic marine communities from the end-Permian mass extinction at the low latitudes of eastern Panthalassa
Based on the quantitative community analysis using species-level identifications, we track the restoration of benthic ecosystems after the end-Permian mass extinction throughout the Lower Triassic of
Evenness of Cambrian–Ordovician benthic marine communities in North America
Abstract Biodiversity has two principal components: richness (the number of taxa) and evenness (the distribution of individuals among taxa). Both of these attributes are critical in defining
Species diversity patterns in some present and prehistoric rodent communities
SummaryComparisons of prehistoric (A.D. 1100–1400) and extant cricetine-dominated rodent faunas from two locations in New Mexico and one in Arizona reveal temporal changes in both species diversity
Changes in theoretical ecospace utilization in marine fossil assemblages between the mid-Paleozoic and late Cenozoic
Abstract We present a new three-dimensional theoretical ecospace for the ecological classification of marine animals based on vertical tiering, motility level, and feeding mechanism. In this context,
A model of onshore-offshore change in faunal diversity.
Onshore-offshore patterns of diversification may be the expectation for faunal change quite independently of whether or not clades originate onshore, leading to the prediction that extinction-resistant clades will always diversify at the expense of extinction-prone clades.
Phanerozoic diversity and neutral theory
Evidence from marine invertebrate communities that there is a Phanerozoic increase in the fundamental biodiversity number (&thgr;), which describes diversity and relative abundance distributions in neutral ecological theory, suggests that an increase in primary productivity through time is the primary cause of Phanrozoic increases in global richness, local richness,Local evenness, abundance, and body size.
Increase in evenness and sampled alpha diversity through the Phanerozoic: Comparison of early Paleozoic and Cenozoic marine fossil assemblages
Trends in the relative abundance of taxa are examined and the results indicate that the evenness of fossil samples increased through the Phanerozoic, largely owing to a decrease in the Relative abundance of the most common taxa.


Species diversity in the Phanerozoic: an interpretation
Species diversity among fossil invertebrates of the Phanerozoic is highly correlated with volume and area of sedimentary rocks. The correlations are statistically significant at the 1% level. The
Five benthic communities occupied the shelf regions of the British Isles, Norway, and North America in Upper Llandovery times and the Clorinda Community is the most diverse, with a great variety of small brachiopods which were probably able to attach to small objects in this quiet off-shore environment.
Species diversity in the Phanerozoic: species-area effects
Raup's (1976a) data on Phanerozoic species numbers are examined for species- area relationships, using published estimates of areas of continental seas. By means of multiple regression, species
Marine benthic communities in the Upper Devonian of New York
Four distinctive benthic communities occur in the mid-shelf deltaic deposits of the Upper Devonian Sonyea Group: the Bellerophon Community, dominated by herbivorous gastropods and deposit-feeding
Experimental Zoogeography of Islands. A Two‐Year Record of Colonization
The results of censuses taken at the end of the second year on the four islands in the group located in the lower Keys (El, E2, E3, ST2) found the numbers of species were found to have changed little from the previous year, providing further evidence that they are in equilibrium.
Permo-Triassic Extinctions: Effects of Area on Biotic Equilibrium
Schopf (1974) suggests that the decrease in number of families of marine invertebrates during the Permian and subsequent increase in the Lower Triassic are due to changes in the area of the shallow
Marine Benthic Diversity: A Comparative Study
A within-habitat analysis was made of the bivalve and polychaete components of soft-bottom marine faunas which differed in latitude, depth, temperature, and salinity, and it was indicated that species number is the more valid diversity measurement.
Experimental Zoogeography of Islands: The Colonization of Empty Islands
The first evidence of faunistic equilibrium obtained through controlled, replicated experiments is reported, together with an analysis of the immigration and extinction processes of animal species based on direct observations, to indicate strongly that a dynamic equilibrium number of species exists for any island.
The Palaeoecology of the Top Hosie Shale (Lower Carboniferous) at a Locality Near Kilsyth
  • G. Y. Craig
  • Geology
    Quarterly Journal of the Geological Society of London
  • 1954
Summary The sizes, conditions of preservation and environment of some 5000 fossils collected from two feet (measured vertically) of a calcareous shale of Lower Carboniferous age are analysed and the
Species diversity in the Phanerozoic; a tabulation
On the basis of about 70,000 species citations in the Zoological Record, it is esti- mated that about 190,000 fossil invertebrate species were described and named through 1970. The true figure may be