Macroecología: una disciplina de investigación en auge

Olalla‐Tárraga, Miguel Á.

doi:10.7818/ecos.2014.23-1.01

Cited by 5 publications

(4 citation statements)

References 3 publications

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“…Theory predicts that greater seasonal and inter-annual variability in climatic conditions will favor larger-bodied mammals that are better able to survive poor food availability (Lindstedt & Boyce, 1985;Luque & Ferguson, 2010). This predicted pattern has been found interspecifically for fish and reptiles (Olalla-Tárraga, Rodríguez, & Hawkins, 2006;Pyron, 1999). We found that ringed seals inhabiting northern areas with greater unpredictability in the timing of sea ice breakup and freeze-up grew to a larger size than in F I G U R E 3 Rate of movement for subadult (a) and adult (b) ringed seals and distance traveled for subadult (c) and adult (d) ringed seals from telemetry studies in northern and southern regions of the eastern Canadian Arctic the south.…”

Section: Discussionmentioning

confidence: 91%

Do intraspecific life history patterns follow interspecific predictions? A test using latitudinal variation in ringed seals

et al. 2019

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Mammals adapted to unpredictable and low‐energy environments often evolve a “bet‐hedging” life history strategy characterized by less costly reproductive outputs over a longer and slower‐growing life. In contrast, species adapted to more predictable (i.e., low variation) and higher energy environments may evolve greater fecundity over a shorter and faster‐growing life. We tested whether this known interspecific pattern also occurs within a species. We compared life history traits of the ringed seal (Pusa hispida) in the Canadian High Arctic to those closer to the southern limit of the species' circumpolar distribution. We found that northern seals grew slower than southern seals (Brody growth coefficient), achieved a greater asymptotic body weight (82 and 69 kg vs. 74 and 54 kg female and male, respectively), reached sexual maturity later (6.1 years vs. 4.5 years), had lower fecundity (1.8 years vs. 1.3 years interbirth interval), longer average lifespan (5 years vs. 3 years median age), and greater movements (1,269 vs. 681 km). Mating systems also likely differed with northern seals showing morphological evidence of a promiscuous mating system with potential sperm competition as indicated by greater relative testes size. The northern region was also characterized by more unpredictable environmental timing of seasonal events, such as spring sea ice breakup. Life history variation between the intraspecific groups of seals appears to agree with interspecific patterns and provides a better understanding of how species' life history parameters shift in concert with environmental conditions.

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Section: Discussionmentioning

confidence: 91%

Do intraspecific life history patterns follow interspecific predictions? A test using latitudinal variation in ringed seals

et al. 2019

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“…The abovementioned cases of Pleistocene amphibians and reptiles apparently support this hypothesis but the precise climatic parameters of the layers that yielded the fossil material should be checked. Experimental analyses on living amphibians (Bizer 1978;Morrison & Hero 2003;Measey & van Dongen 2006;Reading 2007) and reptiles (Angilletta et al 2004;Cruz et al 2005) support the applicability of Bergmann's rule to some members of the herpetofauna but, at this stage, it is not possible to draw general conclusions because of several exceptions (Olalla-Tárraga et al 2006;Olalla-Tárraga & Rodríguez 2007;Terribile et al 2009). Holman (1998 proposes that the large size of some Pleistocene amphibians and reptiles could be explained by the fact that they responded to the reverse of Bergmann's rule (and, therefore, he assumed that they were all coming from warm interglacials).…”

Section: Pleistocene Giantsmentioning

confidence: 99%

A giant crocodile in the Dubois Collection from the Pleistocene of Kali Gedeh (Java)

Delfino

Vos

2014

Integrative Zoology

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The fauna of the Pleistocene Homo-bearing sites of Java has been well known for more than a century. A recent revision of the crocodylian remains confirmed both the validity of Gavialis bengawanicus and the synonymization of Crocodylus ossifragus with C. siamensis. Here we report on a still unpublished crocodylian specimen collected by Eugene Dubois in the latest Early Pleistocene of Kali Gedeh that can be tentatively referred to the genus Crocodylus. The size of the specimen, the approximately 1 m long lower jaw in particular, indicated that this crocodile attained a total length of approximately 6 or 7 m. Along with specimens from the Plio-Pleistocene of Africa, this material provides evidence for gigantism in Crocodylus. It is not clear whether or not the 'temperature-size rule' applies to fossil crocodylians, but due to the growing interest in predicting future temperature-related size changes of the extant organisms, it would be interesting to study in detail the past reaction to temperature changes of crocodylians and other terrestrial ectothermic animals.

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“…The use of bioclimatic models to study the ecological niche of species has been consolidated as a research field, since its application can contribute to knowing the potential distribution of living organisms, bringing us closer to macroecology [1,2]. The use of climate models related to the distribution of species can be applied to learn about habitat changes from various points of view (conservation of species, dispersion of disease vectors, colonization of organisms foreign to new ecosystems, effects of climate change, etc.)…”

Section: Introductionmentioning

confidence: 99%

High-Resolution Bioclimatic Surfaces for Southern Peru: An Approach to Climate Reality for Biological Conservation

Pauca-Tanco¹,

Arias-Enríquez²,

Quispe-Turpo³

2023

Preprint

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Ecological niche models have become exceptionally important, since their results allow to un-derstand many aspects related to the biology of the species being studied, even understanding its evolutionary relationships or their response to past or future projections. In this research, models were prepared to create climatic surfaces so as to produce bioclimatic layers based on the mete-orological data of the south of Peru. Temperature and precipitation data from 119 stations were obtained and homogenized. Then, using geographic and orographic covariates, models were prepared so as to obtain climatic surfaces of maximum and minimum temperature, and precipi-tation. The produced layers were evaluated through root-mean-square deviation (RMSD), mean absolute deviation of error (MAD) and goodness of fit (R2), and they were compared to other models for the area. Finally, the 19 bioclimatic surfaces were created. The results show general patterns for temperature and precipitation, some of them being particular. The climatic layers produced showed acceptable values for RMSD, MAD and R2. Comparison with other models shows statistically significant differences. Both the climatic and the produced bioclimatic surfaces were entered into a database for free access. Finally, comments are made on the importance and application of the bioclimatic layers produced here.

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Macroecología: una disciplina de investigación en auge

Cited by 5 publications

References 3 publications

Do intraspecific life history patterns follow interspecific predictions? A test using latitudinal variation in ringed seals

Do intraspecific life history patterns follow interspecific predictions? A test using latitudinal variation in ringed seals

A giant crocodile in the Dubois Collection from the Pleistocene of Kali Gedeh (Java)

High-Resolution Bioclimatic Surfaces for Southern Peru: An Approach to Climate Reality for Biological Conservation

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