Size-based intraspecific variations along altitudinal gradient and follow of Bergmann’s rule in Parthenium beetle, Zygogramma bicolorata Pallister

Bhusal, Daya Ram; Patel, Priya; Ghimire, Kishor Chandra; Bista, M. S.; Kumar, Bhupendra

doi:10.1016/j.aspen.2019.10.008

Cited by 10 publications

(4 citation statements)

References 49 publications

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“…Previous studies on beetles have extensively investigated variations in body traits along altitudinal gradients, which have been associated with factors such as predation pressure, food availability, or microhabitat variation (e.g., Baranovská and Knapp. [ 40 ], Bhusal et al [ 41 ], Talarico et al [ 42 ]).…”

Section: Discussionmentioning

confidence: 99%

A New Species of Bryaxis (Coleoptera: Staphylinidae: Pselaphinae) from Mount Etna (Sicily, Italy) and Notes on Its Ecology and Distribution

Sabella,

Nicolosi

2023

Animals

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A new species of the subfamily Pselaphinae (Coleoptera: Staphylinidae) has been discovered on Mount Etna (Sicily, Italy) and is described herein as Bryaxis aetnensis sp. nov. The new species is closely associated with the Bryaxis difficilis group, a highly homogeneous group of species living in the regions of Sicily and Sardinia. Diagnostic features and distribution of Sicilian species of this group are treated and illustrated herein. Bryaxis aetnensis sp. nov. exhibits similarities to B. marinae but can be distinguished by the darker color, longer antennal scape and terminal palpomere, and in the aedeagus morphology. The distribution of B. aetnensis sp. nov. spans a wide altitudinal range, demonstrating a remarkable climatic tolerance across the slopes and diverse habitats of Mount Etna. This broad tolerance reflects the species’ probable high ecological plasticity, which may also contribute to the observed morphological variability among individuals from different sampling sites. The significance of this new discovery on Mount Etna highlights the need to intensify sampling efforts in the region. Strengthening protection for these unexplored environments is crucial, and it also aids in unraveling biogeographic questions about the fauna inhabiting the area. As a relatively young volcanic environment, species colonization has occurred recently, making it an intriguing subject of investigation.

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Section: Discussionmentioning

confidence: 99%

A New Species of Bryaxis (Coleoptera: Staphylinidae: Pselaphinae) from Mount Etna (Sicily, Italy) and Notes on Its Ecology and Distribution

Sabella,

Nicolosi

2023

Animals

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“…(Scarabaeidae) [ 8 ], Dichroplus Pratensis (Acrididae) [ 9 ], and Paropsis atomaria (Chrysomelidae) [ 10 ]. Conversely, the body size of Zygogramma bicolorata (Chrysomelidae) [ 11 ], weevils [ 12 ], moths [ 13 ], butterflies [ 14 ], stoneflies [ 15 ], and psyllids [ 16 ] generally increases with elevation. However, the body size of various insects lacks a clear relationship with altitude or latitude [ 17 , 18 ], and these contradictions are particularly apparent in Hymenoptera.…”

Section: Introductionmentioning

confidence: 99%

Environmental Factors Drive Chalcid Body Size Increases with Altitudinal Gradients for Two Hyper-Diverse Taxa

Kang

Huang

et al. 2023

Insects

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Body size is the most essential feature that significantly correlates with insects’ longevity, fecundity, metabolic rate, and sex ratio. Numerous biogeographical rules have been proposed to illustrate the correlation between the body sizes of different taxa and corresponding geographical or environmental factors. Whether the minute and multifarious chalcids exhibit a similar geographical pattern is still little known. In this research, we analyzed morphological data from 2953 specimens worldwide, including the two most abundant and diverse taxa (Pteromalidae and Eulophidae), which are both composed of field-collected and BOLD system specimens. We examined forewing length as a surrogate of body size and analyzed the average size separately for males and females using two methods (species and assemblage-based method). To verify Bergmann’s rule, we included temperature, precipitation, wind speed and solar radiation as explanatory variables in a generalized linear model to analyze the causes of the size variation. We found that there was an increasing trend in the body size of Pteromalidae and Eulophidae with altitude. The optimal Akaike information criterion (AIC) models showed that larger sizes are significantly negatively correlated with temperature and positively correlated with precipitation, and the possible reasons for this variation are discussed and analyzed.

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“…The contrasting results obtained from the investigation of Bergmann's hypothesis suggest influence of other confounding factors, such as microclimates along latitudinal and altitudinal gradients (e.g., Shelomi, 2012;Bhusal et al, 2019). With the global climate change affecting all life forms on earth (Crozier et al, 2008;Şekercioĝlu et al, 2012), understanding species adaptation is important from an applied perspective.…”

Section: Introductionmentioning

confidence: 99%

Bergmann’s Rule Holds in Birds Inhabiting Southern Guinea Forests but Not in the Northern Savanna of Nigeria

Barshep¹,

Awoyemi

Abalaka³

et al. 2022

Front. Ecol. Evol.

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The Bergmann’s rule predicts that in endotherms, body sizes will differ with respect to thermal gradients. Larger bodied individuals will inhabit colder environments while in warmer environments, individuals will be smaller-bodied. This hypothesis has been proved and disproved many times due to inconsistencies in body size differences along latitudinal gradients. We tested this hypothesis in 30 Afrotropical resident bird species inhabiting two vegetation types at different latitudes (southern guinea forests and northern savanna) and at different altitudes in Nigeria, West Africa. Using principal component analyses of body mass and wing length, the first principal component, the component of size, indicated that individuals in montane areas were larger than lowland populations in southern guinea forests. However, in the northern guinea savanna, there was no significant difference in body sizes between lowland and montane populations. General linear models show that body size increases as temperature decreases. In species found in both southern guinea forests and northern savanna (i.e., African Thrush Turdus pelios and Snowy-crowned Robin Chat Cossypha niveicapilla), variations in body sizes were significantly dependent on sites. Our study indicates that other macro-scale factors such as vegetation and rainfall patterns might modulate conformity to Bergmann’s rule in Afrotropical environments.

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Size-based intraspecific variations along altitudinal gradient and follow of Bergmann’s rule in Parthenium beetle, Zygogramma bicolorata Pallister

Cited by 10 publications

References 49 publications

A New Species of Bryaxis (Coleoptera: Staphylinidae: Pselaphinae) from Mount Etna (Sicily, Italy) and Notes on Its Ecology and Distribution

A New Species of Bryaxis (Coleoptera: Staphylinidae: Pselaphinae) from Mount Etna (Sicily, Italy) and Notes on Its Ecology and Distribution

Environmental Factors Drive Chalcid Body Size Increases with Altitudinal Gradients for Two Hyper-Diverse Taxa

Bergmann’s Rule Holds in Birds Inhabiting Southern Guinea Forests but Not in the Northern Savanna of Nigeria

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