Biogeographic affiliation and centers of richness as predictors of elevational range‐size patterns for Malesian flora DOI Creative Commons
Melissa Whitman, Sabrina E. Russo

Ecography, Год журнала: 2024, Номер 2024(5)

Опубликована: Фев. 14, 2024

Our goal was to interrogate the idea that “mountain passes are higher in tropics” by investigating ecological and biogeographic drivers of elevational range‐sizes patterns among equatorial flora. We used herbarium records for 60 species‐rich plant families, representing 18 535 species total, estimate distributions over a 4500 m gradient. For each family, we estimated change average with increasing elevation (i.e. Rapoport's rule, abbreviated as ERR) quantified 15 metrics familial richness distribution, evolutionary age, affiliation. visualized covariation across families using phylogenetic principal components analysis (pPCA). then evaluated how family‐level ERR slopes correlated metric individually, well when multivariate techniques reduce dimensionality. hypothesized if long term climate stability millions years promotes habitat specialization, taxa longer‐term tropical affiliations, would expect smaller within lowland forests, greater range‐size expansion towards elevations, expressed positive slope. Conversely, variation growing conditions should promote larger, relatively consistent, at all sections an gradient, neutral results support this corollary because dichotomy observed relation distribution historical positioning. found Sundaland endemism, or restricted had slopes. Families stronger Sahul affiliation, montane centered richness, shallower, neutral, negative slopes, did clades temperate origins. Wallacea broader latitudinal distributions, cosmopolitanism, older age mixed results. conclude relative steepness slope is indicator taxonomic group's tolerance vulnerability contemporary change.

Язык: Английский

From earthquakes to island area: multi‐scale effects upon local diversity DOI Creative Commons
Liam Trethowan, Fabian Brambach, Rodrigo Cámara‐Leret

и другие.

Ecography, Год журнала: 2024, Номер 2024(5)

Опубликована: Март 29, 2024

Tropical forests occupy small coral atolls to the vast Amazon basin. They occur across bioregions with different geological and climatic history. Differences in area bioregional history shape species immigration, extinction diversification. How this effects local diversity is unclear. The Indonesian archipelago hosts thousands of tree whose coexistence should depend upon these factors. Using a novel dataset 215 forest plots, fifteen islands ranging from 120 785 000 km 2 , we apply Gaussian mixed models examine simultaneous environment, earthquake proximity, island bioregion for trees ≥ 10 cm diameter at breast height. We find that declines precipitation seasonality increases area. Accounting environment show westernmost Sunda has greater than Wallacea, which turn easternmost Sahul. However, when model includes activity (here proximity major earthquakes), differences are reduced. Overall, results indicate multi‐scale, current historic dictate diversity. These multi‐scale drivers not be ignored studying biodiversity gradients their impacts ecosystem function.

Язык: Английский

Процитировано

2
Environmental stress influences Malesian Lamiaceae distributions DOI Creative Commons
Liam Trethowan,

Camilla Arvidsson,

Gemma L. C. Bramley

и другие.

Ecology and Evolution, Год журнала: 2022, Номер 12(11)

Опубликована: Ноя. 1, 2022

Abstract Dual effects of spatial distance and environment shape archipelagic floras. In Malesia, there are multiple environmental stressors associated with increasing uplands, drought, metal‐rich ultramafic soils. Here, we examine the contrasting impacts multifactorial stress upon Lamiaceae species distributions. We used a phylogenetic generalized mixed model occurrence across Malesia's taxonomic database working group areas from Peninsular Malaysia to New Guinea. Predictor variables were stress, between two trait principal component axes responsible for fruit leaf size negative correlation flower plant height. found that smaller fruits leaves more likely tolerate become widely distributed megadiverse Malesian islands. How global distribution diversification shaped by requires further examination.

Язык: Английский

Процитировано

4
Island area, isolation and climate effects upon flower traits in a megadiverse archipelago DOI Creative Commons
Liam Trethowan, Laura Jennings, Gemma L. C. Bramley

и другие.

Journal of Biogeography, Год журнала: 2023, Номер 51(9), С. 1659 - 1669

Опубликована: Окт. 26, 2023

Abstract Aim Flower traits are critical to the mutualistic networks that underpin ecosystem function. However, broad‐scale drivers of flower unclear. Using megadiverse islands Malesia, we test three hypotheses: (1) size, openness and colourfulness (i.e. trend from white colourful flowers) will decrease with increasing temperature, but not precipitation seasonality. (2) increase island area, isolation. (3) Models parameterised by climate, rather than non‐climatic characteristics have greatest predictive capacity as climate affects both pollinator communities energetic/physiological constraints upon traits. Location Fourteen Malesian islands. Taxon Angiosperms. Methods We applied Bayesian phylogenetic models occurrence for >2500 species in 400 m elevation bands, across islands, a function trait interactions either climatic variables or characteristics. compare based on versus using Leave One Out‐Cross Validation. Results All six examined varied at least seasonality, area Flowers larger cold environments. The lowland tropics mostly inhabited flowered species. At high elevations, red pink more frequent whereas green purple drought‐prone seasonally dry tropics. declined seasonality increased performed best perianth length, flowers, flowers were better predicted Main Conclusions There relationships between gradients within Malesia. also left legacy current distributions. These biogeographical impacts likely key eco‐evolutionary

Язык: Английский

Процитировано

2
Biogeographic affiliation and centers of richness as predictors of elevational range‐size patterns for Malesian flora DOI Creative Commons
Melissa Whitman, Sabrina E. Russo

Ecography, Год журнала: 2024, Номер 2024(5)

Опубликована: Фев. 14, 2024

Our goal was to interrogate the idea that “mountain passes are higher in tropics” by investigating ecological and biogeographic drivers of elevational range‐sizes patterns among equatorial flora. We used herbarium records for 60 species‐rich plant families, representing 18 535 species total, estimate distributions over a 4500 m gradient. For each family, we estimated change average with increasing elevation (i.e. Rapoport's rule, abbreviated as ERR) quantified 15 metrics familial richness distribution, evolutionary age, affiliation. visualized covariation across families using phylogenetic principal components analysis (pPCA). then evaluated how family‐level ERR slopes correlated metric individually, well when multivariate techniques reduce dimensionality. hypothesized if long term climate stability millions years promotes habitat specialization, taxa longer‐term tropical affiliations, would expect smaller within lowland forests, greater range‐size expansion towards elevations, expressed positive slope. Conversely, variation growing conditions should promote larger, relatively consistent, at all sections an gradient, neutral results support this corollary because dichotomy observed relation distribution historical positioning. found Sundaland endemism, or restricted had slopes. Families stronger Sahul affiliation, montane centered richness, shallower, neutral, negative slopes, did clades temperate origins. Wallacea broader latitudinal distributions, cosmopolitanism, older age mixed results. conclude relative steepness slope is indicator taxonomic group's tolerance vulnerability contemporary change.

Язык: Английский

Процитировано

0