@article{Fernandes:2022:10.1101/2022.10.26.513952,
author = {Fernandes, LD and Hintzen, RE and Thompson, SED and Barychka, T and Tittensor, D and Harfoot, M and Newbold, T and Rosindell, J},
doi = {10.1101/2022.10.26.513952},
title = {Species Richness and Speciation Rates for all Terrestrial Animals Emerge from a Synthesis of Ecological Theories},
url = {http://dx.doi.org/10.1101/2022.10.26.513952},
year = {2022}
}

Download

TY  - JOUR
AB  - <jats:title>A<jats:sc>bstract</jats:sc></jats:title><jats:p>The total number of species on earth and the rate at which new species are created are fundamental questions for ecology, evolution and conservation. These questions have typically been approached separately, despite their obvious interconnection. In this manuscript we approach both questions in conjunction, for all terrestrial animals, which enables a more holistic integration and generates novel emergent predictions. To do this, we combine two previously unconnected bodies of theory: general ecosystem modelling and individual based ecological neutral theory. General ecosystem models provide us with estimated numbers of individual organisms, separated by functional group and body size. Neutral theory, applied within a guild of functionally similar individuals, connects species richness, speciation rate and number of individual organisms. In combination, for terrestrial endotherms where species numbers are known, they provide us with estimates for speciation rates as a function of body size and diet class. Extrapolating the same rates to guilds of ectotherms enables us to estimate the species richness of those groups, including species yet to be described. We find that speciation rates per species per million years decrease with increasing body size. Rates are also higher for carnivores compared to omnivores or herbivores of the same body size. Our estimate for the total number of terrestrial species of animals is in the range 1.03 − 2.92 million species, a value consistent with estimates from previous studies, despite having used a fundamentally new approach. Perhaps what is most remarkable about these results is that they have been obtained using only limited data from larger endotherms and their speciation rates, with the rest of the predictive process being based on mechanistic theory. This work illustrates the potential of a new approach to classic eco-evolutionary q
AU  - Fernandes,LD
AU  - Hintzen,RE
AU  - Thompson,SED
AU  - Barychka,T
AU  - Tittensor,D
AU  - Harfoot,M
AU  - Newbold,T
AU  - Rosindell,J
DO  - 10.1101/2022.10.26.513952
PY  - 2022///
TI  - Species Richness and Speciation Rates for all Terrestrial Animals Emerge from a Synthesis of Ecological Theories
UR  - http://dx.doi.org/10.1101/2022.10.26.513952
ER  - 

Download