Drivers and constraints on floral latitudinal diversification gradients

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Drivers and constraints on floral latitudinal diversification gradients

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Drivers and constraints on floral latitudinal diversification gradients

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10506 - Paleontology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Journal of Biogeography

ISSN

0305-0270

e-ISSN

—

Svazek periodika

45

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

1408-1419

Kód UT WoS článku

000435275300019

EID výsledku v databázi Scopus

2-s2.0-85044319313