Incorporation of latitude-adjusted bioclimatic variables increases accuracy in species distribution models

Andersen, Desiree; Litvinchuk, Spartak N.; Jang, Hoan Jin; Jiang, Jianping; Koo, Kyo Soung; Maslova, Irina V.; Kim, Daemin; Jang, Yikweon; Borzée, Amaël

doi:10.1016/j.ecolmodel.2022.109986

Cited by 10 publications

(7 citation statements)

References 49 publications

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“…However, the magnitude of plasticity in thermal tolerance in response to environmental signals is expected to be different between species, depending on their thermal sensitivity. Considering that B. sachalinensis is an ecological generalist and has a broad distribution range [ 31 ], especially when compared to R. uenoi [ 28 ], the environmental variability within the five-degree latitudinal gradient studied is not sufficiently large to show plasticity in CTmax, and therefore may preclude the species from adapting to climate change, despite demonstrated variations in responses to environmental variables within the range of the species [ 39 ]. Alternatively, it is possible that B. sachalinensis does not need to show plasticity in CTmax due to their generalist lifestyle or because of other mechanisms of regulation.…”

Section: Discussionmentioning

confidence: 99%

“…In addition, sampling in the Republic of Korea along the same general latitudinal and climatic variation was able to demonstrate the Rapoport’s rule in ants [ 37 ], and passerine bird species richness was influenced by the latitudinal gradient [ 38 ]. Finally, the ecology of one of the focal species is known to be latitudinally dependent, as shown through ecological models [ 39 ]. At each site, three ponds were selected and eight tadpoles at Gosner development stages between 26 and 29 [ 40 ] were collected from each of the three ponds to avoid sampling tadpoles from the same clutch.…”

Section: Methodsmentioning

confidence: 99%

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Latitude-Induced and Behaviorally Thermoregulated Variations in Upper Thermal Tolerance of Two Anuran Species

Kim

Chuang

Borzée

et al. 2022

Biology

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Although thermal tolerance along geographical gradients gives an insight into species’ response to climate change, current studies on thermal tolerance are strongly skewed towards global-scale patterns. As a result, intraspecific variations are often assumed to be constant, despite a lack of evidence. To understand population-specific responses to thermal stress, we investigated the presence of intraspecific variations in the critical thermal maximum (CTmax) of tadpoles in two anuran species, Rana uenoi and Bufo sachalinensis. The study was conducted across a five-degree latitudinal gradient in the Republic of Korea. We exposed the tadpoles to increasing temperatures and recorded the CTmax for 270 R. uenoi individuals from 11 sites, collected in rice paddies, and for 240 B. sachalinensis individuals from ten sites, collected in reservoirs. We also recorded the swimming performance and behavior of the tadpoles when placed in an experimental apparatus during CTmax measurements. We then used linear regressions to determine the relationship between abiotic factors and CTmax. In R. uenoi, we found a positive relationship between latitude and CTmax, but the tadpoles did not display specific thermoregulatory behaviors. In B. sachalinensis, none of the abiotic factors such as climate and geographic coordinates were related to CTmax, but we detected a tendency to swim close to the water surface when water temperature was increasing. For R. uenoi, we tentatively relate the CTmax variability across the latitudinal gradient to a physiological adaptive response associated with habitat characteristics that are assumed to be fluctuating, as the species inhabits small water bodies prone to drying out. In the case of B. sachalinensis, the behavior observed may be linked to oxygen depletion and thermoregulation, as it may buffer temperature changes in the absence of physiological adjustment. These findings suggest that intra-specific variations in CTmax are greater than generally accounted for, and thermal conditions of natural environments are important for understanding thermal tolerance in ectothermic species. Our results highlight that species’ specific responses to climate warmings need to be studied to better protect species against climate change.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Latitude-Induced and Behaviorally Thermoregulated Variations in Upper Thermal Tolerance of Two Anuran Species

Kim

Chuang

Borzée

et al. 2022

Biology

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“…While we acknowledge the presence of latitudinal variations in breeding phenology and ecological requirements of species within the Korean peninsula (Andersen et al, 2022), we did not consider the variation large enough to impact the results of this study. In addition, we do not expect a significant gradient due to the small size of the country and creating bins would result in too small of a dataset to be meaningful for some species at some of the elevation bins.…”

Section: Data Encodingmentioning

confidence: 99%

Breeding phenology and landscape use in all amphibian species from the Republic of Korea based on open-source data

Groffen

Andersen²,

Borzée³

2022

Front. Environ. Sci.

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Biodiversity is declining worldwide with habitat loss and climate change being among the main threats. While it is easy to quantify habitat loss, the impacts of climate change are less obvious. It is therefore important to understand species habitat use and breeding phenology before a significant shift results in the loss of knowledge. Here, we determined the habitat use and breeding phenology for all Korean amphibian species based on citizen science (8,763 observations), collected between 1997–2020. We found the breeding seasons as we defined them to be generally shorter than described in the literature despite large variations between species. Species were further dichotomised into early and late breeders with breeding periods peaking in mid-March and mid-June respectively. We found early breeding species to have a shortened hibernating period with only six days being consistently devoid of observations over the 23 years of the period studied for the species with the shortest inactive season. Habitat use was significantly different between all species, with pair-wise comparisons highlighting greater differences among rather than within genera, highlighting the threats to species across all genera. In addition, our results set a baseline for future analyses about climate change and habitat use.

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“…Moreover, considering topographic variables are the most important factors for P. euphratica [40] and are positively correlated with SDMs [41], elevation, the distance from the river reservoir were also selected as an input variable. Since the inclusion of latitude and longitude-adjusted environmental variables more accurate modeling of species distribution and suitability are available [42], latitude and longitude were also considered here. Therefore, 12 months of groundwater, elevation, distance from the river, and latitude and longitude were considered as inputs to the model in this study (table 1).…”

Section: Variables Selectionmentioning

confidence: 99%

Simulation of potential endangered species distribution in drylands with small sample size based on semi-supervised models

Liu

GUI

et al. 2023

Environ. Res. Lett.

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Identifying suitable habitats for endangered species is critical to promote the recovery of endangered species. However, Conventional species distribution models (SDMs) need large amounts of labeled sample data to learn the relationship between species and environmental conditions, is difficult to fully detangle the role of the environment in the distribution of endangered species, which are very sparsely distributed and have environmental heterogeneity. This study’s first innovation used the semi-supervised model to accurately simulate the suitable habitats for endangered species with a small sample size. The model performance was compared with three conventional SDMs, namely Maxent, Generalized Linear Model (GLM), and Support Vector Machine (SVM). Applying the model to the endangered species Populus euphratica in the lower Tarim River basin, Northwest China. The results showed that the semi-supervised model exhibited better performance than conventional SDMs with an accuracy of 85% when only using 443 Populus euphratica samples. All models developed using smaller sample sizes exhibit worse performance in the prediction of habitat suitability areas for endangered species while the semi-supervised model is still excellent. The results showed that the suitable habitat for Populus euphratica is mainly near the river channel of the lower Tarim River basin, accounting for 13.49 % of the study area. The lower Tarim River still has enormous land potential for the restoration of endangered Populus euphratica. The model developed here can be used to evaluate the suitable habitat for endangered species with only a small sample size, and provide a basis for the conservation of endangered species.

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Incorporation of latitude-adjusted bioclimatic variables increases accuracy in species distribution models

Cited by 10 publications

References 49 publications

Latitude-Induced and Behaviorally Thermoregulated Variations in Upper Thermal Tolerance of Two Anuran Species

Latitude-Induced and Behaviorally Thermoregulated Variations in Upper Thermal Tolerance of Two Anuran Species

Breeding phenology and landscape use in all amphibian species from the Republic of Korea based on open-source data

Simulation of potential endangered species distribution in drylands with small sample size based on semi-supervised models

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