[OANNES Foro] =?gb2312?B?Q29hc3RhbCBiaW9waHlzaWNhbCBwcm9jZXNzZXMgYW5kIHRoZSBiaQ==?= =?gb2312?B?b2dlb2dyYXBoeSBvZiByb2NreSBpbnRlcnRpZGFsIHNwZWNpZXMgYQ==?= =?gb2312?B?bG9uZyB0aGUgc291dGipXGVhc3Rlcm4gUGFjaWZpYw==?=

[Mario Cabrejos]

Journal of Biogeography

First published: 02 January 2019

 <https://doi.org/10.1111/jbi.13492> https://doi.org/10.1111/jbi.13492


 


Coastal biophysical processes and the biogeography of rocky intertidal
species along the south©\eastern Pacific


 
<https://onlinelibrary.wiley.com/action/doSearch?ContribAuthorStored=Lara%2C
+Carlos> Carlos Lara
<https://onlinelibrary.wiley.com/action/doSearch?ContribAuthorStored=Sald%C3
%ADas%2C+Gonzalo+S> Gonzalo S. Sald¨ªas
<https://onlinelibrary.wiley.com/action/doSearch?ContribAuthorStored=Cazelle
s%2C+Bernard> Bernard Cazelles
<https://onlinelibrary.wiley.com/action/doSearch?ContribAuthorStored=Rivaden
eira%2C+Marcelo+M> Marcelo M. Rivadeneira
<https://onlinelibrary.wiley.com/action/doSearch?ContribAuthorStored=Haye%2C
+Pilar+A> Pilar A. Haye
<https://onlinelibrary.wiley.com/action/doSearch?ContribAuthorStored=Broitma
n%2C+Bernardo+R> Bernardo R. Broitman

 


Abstract


Aim


We assess the spatial distribution of a suite of coastal biophysical
characteristics and how their variability is related to the distribution and
geographic range of a diverse assemblage of coastal benthic species with
different larval dispersal strategies.


Location


South©\eastern Pacific (SEP) coast between 18¡ã20¡äS and 42¡ã35¡äS.


Methods


Biophysical variability was assessed using chlorophyll©\a concentration, sea
surface temperature and the signal of turbid river plumes derived from MODIS
onboard the Aqua satellite. We established the dominant spatial components
using wavelet and coherence analysis, and evaluated the biogeographic
structure of 51 rocky intertidal species sampled over ~2,600 km along the
SEP using multivariate classification and regression trees.


Results


Biogeographic breaks detected here were consistent with recent biogeographic
classification schemes. Distribution breakpoints for species with
lecithotrophic larvae clustered around 30¡ãS. We observed a previously
unreported break in the distribution of species with planktotrophic larval
dispersal strategies around 35¡ãS. These breaks are related to coherence in
the spatial structure of sea surface temperature, chlorophyll©\a and river
outflow over different temporal scales. Regions with similar biophysical
characteristics, and the breaks the separate them, are in striking agreement
with the biogeographic patterns revealed by the multivariate classification
trees.


Main conclusions


Our results reconcile patterns of biogeographic structure reported for other
groups of species along the SEP coast. We suggest that river outflow, a
poorly studied coastal environmental forcing, may play an important role in
determining the geographic distribution of rocky shore species, probably
through its effects on larval dispersal patterns.

 



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