scholarly journals Climatic niche breadths of the Atlantic Forest snakes do not increase with increasing latitude

2021 ◽  
Author(s):  
José Thales da Motta Portillo ◽  
Fausto Erritto Barbo ◽  
Ricardo J Sawaya
Keyword(s):  
Atlantic Forest ◽  
Phylogenetic Signal ◽  
Generalized Least Squares ◽  
Niche Conservatism ◽  
General View ◽  
South American ◽  
Climatic Niche ◽  
Trade Off ◽  
Phylogenetic Niche Conservatism ◽  
Temperature And Precipitation

Abstract The climatic niche is a central concept for understanding species distribution, with current and past climate interpreted as strong drivers of present and historical geographical ranges. Our aim is to understand whether Atlantic Forest snakes follow the general geographical pattern of increasing species climatic niche breadths with increasing latitude. We also tested if there is a trade-off between temperature and precipitation niche breadths of species in order to understand if species with larger breadths of one niche dimension have stronger dispersal constraints by the other due to narrower niche breadths. Niche breadths were calculated by the subtraction of maximal and minimal values of temperature and precipitation across species ranges. We implemented Phylogenetic Generalized Least Squares (PGLS) to measure the relationship between temperature and precipitation niche breadths and latitude. We also tested phylogenetic signals by Lambda statistics to analyze the degree of phylogenetic niche conservatism to both niche dimensions. Temperature niche breadths were not related to latitude. Precipitation niche breadths decreased with increasing latitude and presented a high phylogenetic signal, i.e. significant phylogenetic niche conservatism. We rejected the trade-off hypotheses of temperature and precipitation niche breadths. Our results also indicate that precipitation should be an important ecological constraint affecting the geographical distribution of snake lineages across the South American Atlantic Forest. We then provide a general view of how phylogenetic niche conservatism could impact the patterns of latitudinal variation of climatic niches across this biodiversity hotspot.

scholarly journals Climatic niche evolution in the viviparousSceloporus torquatusgroup (Squamata: Phrynosomatidae)

PeerJ ◽  
2019 ◽  
Vol 6 ◽  
pp. e6192 ◽  
Author(s):  
Norberto Martínez-Méndez ◽  
Omar Mejía ◽  
Jorge Ortega ◽  
Fausto Méndez-de la Cruz
Keyword(s):  
Phylogenetic Signal ◽  
Principal Component ◽  
Niche Differentiation ◽  
Cold Climate ◽  
Niche Conservatism ◽  
Niche Evolution ◽  
Climatic Niche ◽  
Precipitation Seasonality ◽  
Bioclimatic Variables ◽  
Dry Conditions

The cold-climate hypothesis maintains that viviparity arose as a means to prevent increased egg mortality in nests owing to low temperatures, and this hypothesis represents the primary and most strongly supported explanation for the evolution of viviparity in reptiles. In this regard, certain authors have stated that viviparous species will exhibit speciation via climatic niche conservatism, with similar climatic niches being observed in allopatric sister species. However, this prediction remains to be tested with bioclimatic variables relevant to each viviparous group. In the present study, we examined climatic niche evolution in a group of North American viviparous lizards to determine whether their diversification is linked to phylogenetic niche conservatism (PNC). We evaluated the phylogenetic signal and trait evolution of individual bioclimatic variables and principal component (PC) scores of a PC analysis, along with reconstructions of ancestral climate tolerances. The results suggest that diversification of theSceloporus torquatusgroup species is associated with both niche differentiation and PNC. Furthermore, we did not observe PNC across nearly all bioclimatic variables and in PC2 and PC3. However, in Precipitation Seasonality (Bio15), in Precipitation of Coldest Quarter (Bio19) and in PC1 (weakly associated with variability of temperature), we did observe PNC. Additionally, variation of the scores along the phylogeny and Pagel’s delta (δ) >1 of PC3 suggests a fast, recent evolution to dry conditions in the clade that sustainsS. serrifer.

scholarly journals Phylogenetic niche conservatism and plant diversification in South American subtropical grasslands along multiple climatic dimensions

2020 ◽  
Vol 43 (2) ◽  
Author(s):  
Michel J.F. Barros ◽  
Gustavo A. Silva-Arias ◽  
Ana Lúcia Anversa Segatto ◽  
Maikel Reck-Kortmann ◽  
Jeferson N. Fregonezi ◽  
...  
Keyword(s):  
Niche Conservatism ◽  
South American ◽  
Phylogenetic Niche Conservatism ◽  
Plant Diversification

Biogeographical patterns and processes in the genus group Scotussae (Acrididae: Melanoplinae): an integrative approach

2020 ◽  
Vol 131 (2) ◽  
pp. 417-433
Author(s):  
María Celeste Scattolini ◽  
Andrés Lira-Noriega ◽  
Viviana Andrea Confalonieri ◽  
Silvia Pietrokovsky ◽  
María Marta Cigliano
Keyword(s):  
Ecological Niche ◽  
Phylogenetic Signal ◽  
Total Evidence ◽  
Integrative Approach ◽  
Niche Conservatism ◽  
Phylogenetic Distance ◽  
Ecological Processes ◽  
Phylogenetic Niche Conservatism ◽  
Patterns And Processes

Abstract A biogeographical study of the genus group Scotussae, a clade of grasshoppers endemic to the subtropical temperate region of the La Plata Basin, South America, was performed within a phylogenetic context to test whether wing reduction reflects evolutionary and ecological processes within the clade. We used an integrative biogeographical approach to determine the role of geohistorical events, geography, ecology and phylogenetic niche conservatism on the distribution and diversification processes of the group. We performed a total evidence phylogenetic analysis and tested the phylogenetic signal of ecological niche traits (niche optimum and niche breadth). We also assessed the degree to which phylogenetic distance is correlated with geographical and ecological niche traits and we used BioGeoBEARS to estimate ancestral ranges. The results provided evidence for phylogenetic niche conservatism as well as a significant association between phylogeny and both geographical and, more strongly, ecological traits. Two main clades were clearly associated with wing development, and evidence points to the evolutionary and ecological processes within these two groups being different. The Brachypterous clade shows evidence that allopatric speciation was the main source of diversification, while for the Macropterous clade sympatric speciation seems more likely.

Exposure to 19 elements via water ingestion and dermal contact in several South American environments (La Plata Basin): From Andes and Atlantic Forest to sea front

2019 ◽  
Vol 149 ◽  
pp. 103986 ◽  
Author(s):  
E. Avigliano ◽  
C. Clavijo ◽  
P. Scarabotti ◽  
S. Sánchez ◽  
S. Llamazares Vegh ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
South American ◽  
Dermal Contact ◽  
La Plata ◽  
Water Ingestion ◽  
La Plata Basin

Hemimycena longipleurocystidiata (Mycenaceae, Agaricomycetes), a new species from the Argentinean Atlantic Forest 

Phytotaxa ◽  
2014 ◽  
Vol 177 (1) ◽  
pp. 49 ◽  
Author(s):  
Nicolás Niveiro ◽  
Orlando Fabian Popoff ◽  
Edgardo Albertó
Keyword(s):  
New Species ◽  
Atlantic Forest ◽  
Fungal Species ◽  
South American ◽  
A New Species

The Atlantic Forest is the second largest South American tropical-subtropical rainforest and one of the most diverse ecosystems on earth. Hemimycena longipleurocystidiata, a fungal species collected in the Argentinean Atlantic forest, is proposed as new. It is characterized by its whitish and large basidiomata with large pleuro- and cheilocystidia. The species is here described and illustrated and a key is provided to the Hemimycena species known from Argentina.

scholarly journals Links between plant species’ spatial and temporal responses to a warming climate

2014 ◽  
Vol 281 (1779) ◽  
pp. 20133017 ◽  
Author(s):  
Tatsuya Amano ◽  
Robert P. Freckleton ◽  
Simon A. Queenborough ◽  
Simon W. Doxford ◽  
Richard J. Smithers ◽  
...  
Keyword(s):  
Species Distribution Models ◽  
Range Shifts ◽  
Niche Conservatism ◽  
Historical Records ◽  
Perennial Species ◽  
Distribution Models ◽  
Climatic Niche ◽  
Warming Climate ◽  
Phenological Changes

To generate realistic projections of species’ responses to climate change, we need to understand the factors that limit their ability to respond. Although climatic niche conservatism, the maintenance of a species’s climatic niche over time, is a critical assumption in niche-based species distribution models, little is known about how universal it is and how it operates. In particular, few studies have tested the role of climatic niche conservatism via phenological changes in explaining the reported wide variance in the extent of range shifts among species. Using historical records of the phenology and spatial distribution of British plants under a warming climate, we revealed that: (i) perennial species, as well as those with weaker or lagged phenological responses to temperature, experienced a greater increase in temperature during flowering (i.e. failed to maintain climatic niche via phenological changes); (ii) species that failed to maintain climatic niche via phenological changes showed greater northward range shifts; and (iii) there was a complementary relationship between the levels of climatic niche conservatism via phenological changes and range shifts. These results indicate that even species with high climatic niche conservatism might not show range shifts as instead they track warming temperatures during flowering by advancing their phenology.

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