scholarly journals A simple spatially explicit neutral model explains the range size distribution of reef fishes

2019 ◽  
Vol 28 (7) ◽  
pp. 875-890 ◽  
Author(s):  
Adriana Alzate ◽  
Thijs Janzen ◽  
Dries Bonte ◽  
James Rosindell ◽  
Rampal S. Etienne
Keyword(s):  
Size Distribution ◽  
Reef Fishes ◽  
Range Size ◽  
Spatially Explicit ◽  
Neutral Model

scholarly journals A simple spatially explicit neutral model explains range size distribution of reef fishes

2017 ◽  
Author(s):  
Adriana Alzate ◽  
Thijs Janzen ◽  
Dries Bonte ◽  
James Rosindell ◽  
Rampal S. Etienne
Keyword(s):  
Size Distribution ◽  
Empirical Data ◽  
Reef Fishes ◽  
Range Size ◽  
Monte Carlo Algorithm ◽  
Dispersal Ability ◽  
Spatially Explicit ◽  
Size Distributions ◽  
Neutral Model ◽  
Dispersal Events

AbstractAimThe great variation in range sizes among species has fascinated ecologists for decades. In reef-associated fish species, which live in fragmented habitats and adopt a wide range of dispersal strategies, we may expect species with greater dispersal ability to spread over larger ranges. However, empirical evidence for such a positive relationship between dispersal and range size in reef fishes remains scarce. Here, we unveil the more nuanced role of dispersal on the range size distribution of reef associated fishes using empirical data and a novel spatially explicit model.LocationTropical Eastern PacificMajor taxa studiedReef-associated fishesMethodsWe estimated range size distributions for six different guilds of all reef-associated fishes with different dispersal abilities. We used a one-dimensional spatially explicit neutral model, which simulates the distribution of species along a linear coastline to explored the effect of dispersal, speciation and sampling on the distribution of range sizes. Our model adopts a more realistic gradual speciation process (protracted speciation) and incorporates important long distance dispersal events with a fat-tail dispersal kernel. We simulated our model using a highly efficient coalescence approach, which guarantees the metacommunity, is sampled at dynamic equilibrium. We fitted the model to the empirical data using an approximate Bayesian computation approach, with a sequential Monte Carlo algorithm.ResultsStochastic birth, death, speciation and dispersal events alone can accurately explain empirical range size distributions for six different guilds of tropical, reef-associated fishes. Variation in range size distributions among guilds are explained purely by differences in dispersal ability with the best dispersers covering larger ranges.Main conclusionsA simple combination of neutral processes with guild-specific dispersal ability provides a general explanation for both within- and across-guild range size variation. Our results support the theoretically expected, but empirically much debated, hypothesis that dispersal promotes range size.

Estimating jaguar (Panthera onca) density in a preserved coastal area of French Guiana

Mammalia ◽  
2018 ◽  
Vol 82 (2) ◽  
pp. 188-192 ◽  
Author(s):  
Matthis Petit ◽  
Thomas Denis ◽  
Ondine Rux ◽  
Cécile Richard-Hansen ◽  
Rachel Berzins
Keyword(s):  
Home Range ◽  
Coastal Area ◽  
French Guiana ◽  
Scale Parameter ◽  
Local Density ◽  
Home Range Size ◽  
Range Size ◽  
Spatially Explicit ◽  
Panthera Onca ◽  
Capture Recapture

AbstractKnowledge of the jaguar population is needed in French Guiana that faces an increase of human-jaguar conflicts. We carried out a camera trap survey to assess jaguar local density and home range size in a preserved coastal area of French Guiana. We ran spatially explicit capture recapture (SECR) models. In our model, the scale parameterσ, that is linked to the home range size, was larger for males (σ=3.87±0.59 SE km) than for females (σ=2.33±0.30 SE km). The assessed jaguar density was 3.22±0.87 SE ind. 100 km−2, which should be considered as an optimal density in a French Guiana coastal area.

scholarly journals The evolution of latitudinal range limits in tropical reef fishes: heritability, limits, and inverse Rapoport’s rule

2020 ◽  
Author(s):  
Marcio R. Pie ◽  
Raquel Divieso ◽  
Fernanda S. Caron ◽  
Alexandre C. Siqueira ◽  
Diego R. Barneche ◽  
...  
Keyword(s):  
Reef Fish ◽  
High Latitude ◽  
Phylogenetic Signal ◽  
Reef Fishes ◽  
Range Size ◽  
Range Limits ◽  
Phylogenetic Comparative Methods ◽  
Rapoport’S Rule ◽  
Tropical Reef ◽  
Latitudinal Range

ABSTRACTAimIn this study we explore patterns and evolutionary processes of tropical reef fish latitudinal ranges, namely the degree of similarity in range size between ancestor and descendant lineages (i.e. phylogenetic signal); the evolution of range limits; and the latitudinal distribution of range sizes, particularly with respect to Rapoport’s rule.LocationGlobal.TaxonTropical reef fishes.MethodsWe integrate data on the latitudinal distribution and evolutionary history of 5,071 tropical reef fish species with phylogenetic comparative methods to assess the level of phylogenetic signal in latitudinal range size, low- and high-latitude limits, and range medians, and to estimate rates of evolution of those traits. Finally, we test whether latitudinal ranges become smaller near the equator, as predicted by Rapoport’s rule, using phylogenetic generalized least squares.ResultsThere were varying levels of phylogenetic signal in latitudinal range size, low- and high-latitude limits, and range medians. Despite these differences, latitudinal medians were consistently shown to have the highest phylogenetic signal among all measured geographic features. Interestingly, the position of high-latitude limits in general evolved at substantially faster rates than their low-latitude counterparts. Finally, we confirm for the first time the existence of an inverse Rapoport’s rule in marine fishes using phylogenetic comparative methods.Main conclusionsWe uncovered several congruent patterns in latitudinal ranges of tropical reef fish, despite vastly disparate biogeographical distributions and ecological differences between the studied fish lineages. Such broad congruence suggests that the evolution of latitudinal ranges of reef fishes may be governed by common principles.

Using spatially explicit simulations to explore size distribution and spacing of regenerating areas produced by wildfires: recommendations for designing harvest agglomerations for the Canadian boreal forest

2007 ◽  
Vol 83 (1) ◽  
pp. 72-83 ◽  
Author(s):  
Annie Belleau ◽  
Yves Bergeron ◽  
Alain Leduc ◽  
Sylvie Gauthier ◽  
Andrew Fall
Keyword(s):  
Forest Management ◽  
Boreal Forest ◽  
Size Distribution ◽  
Temporal Variability ◽  
Fire Regime ◽  
Natural Disturbance ◽  
Fire Regimes ◽  
Spatially Explicit ◽  
Fire Size ◽  
Canadian Boreal Forest

It is now recognized that in the Canadian boreal forest, timber harvesting activities have replaced wildfires as the main stand-replacing disturbance. Differences in landscape patterns derived from these two sources of disturbance have, however, raised concerns that the way forest harvesting has been dispersed is potentially shifting patterns away from the natural range. In the context of natural disturbance-based management, we used a spatially explicit model designed to capture general fire regimes in order to quantify temporal variability associated with regenerating areas (burnt areas of 25 years or younger), and to develop strategic objectives for harvest agglomeration sizes and dispersion. We first evaluated temporal variability in the proportion of stands younger than 100 years (assumed to be even-aged stands) for various fire regimes (seven fire cycles: 50 to 400 years, and three mean fires sizes: 3000, 15 000 and 60 000 ha). Secondly, we quantified the size distribution and dispersion of regenerating areas for each fire regime. As expected by theoretical fire frequencies and size distributions, the importance of even-aged stands at the forest management unit level was found to decrease with longer fire cycles. However, the temporal variability associated with these proportions is shown to increase with mean fire size. It was also observed that the size distribution and dispersion of regenerating areas was primarily influenced by mean fire size. Based on these observations, natural disturbance-based management objectives were formulated, providing guidelines on harvest agglomeration size and dispersion. Key words: temporal variability, boreal forest, fire regime, forest management, age distribution, fire size distribution, clearcut agglomeration size distribution

The mid-domain effect matters: simulation analyses of range-size distribution data from Mount Kinabalu, Borneo

2008 ◽  
Vol 35 (11) ◽  
pp. 2138-2147 ◽  
Author(s):  
John-Arvid Grytnes ◽  
John H. Beaman ◽  
Tom S. Romdal ◽  
Carsten Rahbek
Keyword(s):  
Size Distribution ◽  
Range Size ◽  
Distribution Data ◽  
Mount Kinabalu

Density-dependent home-range size revealed by spatially explicit capture-recapture

Ecography ◽  
2015 ◽  
Vol 39 (7) ◽  
pp. 676-688 ◽  
Author(s):  
M. G. Efford ◽  
D. K. Dawson ◽  
Y. V. Jhala ◽  
Q. Qureshi
Keyword(s):  
Home Range ◽  
Home Range Size ◽  
Range Size ◽  
Spatially Explicit ◽  
Density Dependent ◽  
Capture Recapture

scholarly journals Adult and larval traits as determinants of geographic range size among tropical reef fishes

2013 ◽  
Vol 110 (41) ◽  
pp. 16498-16502 ◽  
Author(s):  
O. J. Luiz ◽  
A. P. Allen ◽  
D. R. Robertson ◽  
S. R. Floeter ◽  
M. Kulbicki ◽  
...  
Keyword(s):  
Reef Fishes ◽  
Geographic Range ◽  
Range Size ◽  
Geographic Range Size ◽  
Tropical Reef ◽  
Larval Traits
Sign in / Sign up

Export Citation Format

Share Document