Drivers and constraints on floral latitudinal diversification gradients

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F18%3A00491791" target="_blank" >RIV/67985831:_____/18:00491791 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1111/jbi.13216" target="_blank" >http://dx.doi.org/10.1111/jbi.13216</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jbi.13216" target="_blank" >10.1111/jbi.13216</a>

Result language

angličtina

Original language name

Drivers and constraints on floral latitudinal diversification gradients

Original language description

Aim: The latitudinal diversity gradient (LDG) is a primary emergent property of the biosphere, yet the cause(s) of this pattern are still debated. Key to many hypotheses is the origins and maintenance of tropical hyperdiversity, and the role of climate in driving low latitude speciation. Here, we analyse patterns of tropical and extratropical floral diversification and migration during the early Palaeogene greenhouse interval, to shed further light on the relationship between climatic change, latitude and floral diversity. nLocation: The early Palaeogene, from similar to 63 to 42 million years ago, of the US Gulf Coastal Plain (GCP) and Colombia. nTaxon: Terrestrial plants, using pollen and spores as a proxy. nMethods: We analyse species diversity trends using coverage and sample size-based interpolation and extrapolation, Chao1 estimated richness, and evenness metrics. Capture-mark-recapture (CMR) modelling is used to estimate origination and extinction probabilities. Origination patterns on the GCP are separated into insitu speciation versus immigration. nResults: While Colombian (tropical) palynofloral richness and origination rates increased in conjunction with warming, GCP richness remained stable. The single rise in GCP origination rates, coincident with the Palaeocene-Eocene Thermal Maximum, was largely driven by the immigration of Eurasian taxa, rather than insitu origination, which was the case in Colombia. nMain conclusions: These results show that the relationships among climatic parameters and diversification and dispersal are not straightforward. While temperature may have driven diversification in the tropics, other factors, such as precipitation, insolation or biological interactions, may have constrained diversification in the extratropics. Furthermore, our results suggest that outward dispersal from the tropics was limited in the warm world of the early Palaeogene, with most GCP immigrants being sourced from other extratropical regions. These findings suggest that the tropics and extratropics may have functioned independently at this time.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10506 - Paleontology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Biogeography

ISSN

0305-0270

e-ISSN

—

Volume of the periodical

45

Issue of the periodical within the volume

6

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

1408-1419

UT code for WoS article

000435275300019

EID of the result in the Scopus database

2-s2.0-85044319313