The Two Faces of Mt Gede, Java – Species Richness, Composition and Zonation of Epiphytic Bryophytes

Iskandar, Eka Aditya Putri; Stech, Michael; Oliveira, Sylvia Mota de

doi:10.5252/cryptogamiebryologie2020v41a6

Cited by 5 publications

(6 citation statements)

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“…Likewise, on a mountain in Java, epiphytic bryophyte richness showed a hump‐shaped pattern and decreased above ca. 2000 m (Putri Iskandar et al (2020). Species richness peaks at even lower elevations have been reported from Piton des Neiges volcano (Réunion Island), at 1150 m (Ah‐Peng et al, 2012), and Marojejy National Park (northeastern Madagascar), at 1250 m (Marline et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, it is well known that the pH, texture and chemical properties of bark can contribute to the presence and composition of epiphytic bryophyte species (e.g. Romanski et al, 2011; Mežaka et al, 2012; Putri Iskandar et al, 2020). Although in the present study we are unable to disentangle all factors that may potentially shape patterns of bryophyte richness, it is likely that changes in forest structure are partly responsible for the elevational pattern.…”

Section: Discussionmentioning

confidence: 99%

Section: The Lack Of Undisturbed Ecosystems Outside Baru Volcanomentioning

confidence: 99%

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Elevational patterns in tropical bryophyte diversity differ among substrates: A case study on Baru volcano, Panama

Rodríguez-Quiel

Kluge

Mendieta‐Leiva

et al. 2022

J Vegetation Science

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Questions Bryophytes attain their highest diversity in tropical mountain forests. Although distribution patterns have been described, little emphasis has been placed on comparing patterns among substrates (e.g., terrestrial, epiphytic). Understanding these patterns is important, because they determine not only the pool of genetic resources, but also the functioning of these forest ecosystems. Therefore, we studied how bryophyte species diversity changes with elevation, how elevational patterns differ between substrate types, and how elevational trends relate to environmental drivers. Location Baru volcano, Panama. Methods At each of eight elevations, between 1900 and 3300 m, bryophytes were collected in 600‐cm2 plots from six substrate types with four replicates. Species cover was registered as a measure of relative abundance. Species richness and community structure were determined and related to elevation, substrate types, and environmental drivers at three scales (plots, sets of four replicate plots per substrate per elevation, and all plots at each elevation). Results Bryophyte species richness decreased towards higher elevations, at all three scales and on all substrates except bryophytes on soil, for which, at the plot scale, richness peaked at higher elevations than on the other substrates. Relative humidity explained richness slightly better than elevation. Communities at the lowest elevations had the most uneven compositions, due to the presence of many small species with low abundance. Conclusions In studies on the spatial distribution of bryophyte diversity, it is essential to consider different substrates and spatial scales separately. If substrates differ in their elevational species richness patterns, climate and land‐use change may affect bryophyte diversity patterns not only directly, but also indirectly via changes in substrate availability. Therefore, a better understanding of the spatial variation in bryophyte diversity in mountains is essential to elucidate the effects of environmental change on this important group of plants and their implications for ecosystem functioning.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Elevational patterns in tropical bryophyte diversity differ among substrates: A case study on Baru volcano, Panama

Rodríguez-Quiel

Kluge

Mendieta‐Leiva

et al. 2022

J Vegetation Science

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“…This is the first study to compile a large set of elevational richness gradient studies of liverworts on a global scale and to search for general patterns. Previous studies, including some of the original publications used here, have shown a predominance of unimodal hump‐shaped patterns of liverworts species richness (e.g., Boch et al, 2019 ; Grau et al, 2007 ; Tabua et al, 2017 ), although other patterns have been found as well (Bruun et al, 2006 ; Iskandar et al, 2020 ; Tusiime et al, 2007 ). Our study confirms that, overall, the hump‐shaped pattern dominates, and that the richness peak is on average found in the middle of the elevational gradients.…”

Section: Discussionmentioning

confidence: 55%

“…There are various studies providing evidence for a hump‐shaped elevational richness gradient in liverworts from different parts of the world, most of them considering individual transects (Henriques et al, 2016 ; Tabua et al, 2017 ; Wolf, 1993 ), although some are on a regional scale (e.g., Grau et al, 2007 ), or compare two local data sets (Ah‐Peng et al, 2012 ; Iskandar et al, 2020 ). But divergent patterns of the elevation‐dependent change in liverwort species richness have also been described.…”

Section: Introductionmentioning

confidence: 99%

Liverworts show a globally consistent mid‐elevation richness peak

Maul

Wei

Iskandar

et al. 2023

Ecology and Evolution

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The study of elevational gradients allows to draw conclusions on the factors and mechanisms determining patterns in species richness distribution. Several earlier studies investigated liverwort diversity on single or few elevational transects. However, a comprehensive survey of the elevational distribution patterns of liverwort richness and their underlying factors is lacking so far. This study's purpose was to fill this gap by compiling an extensive data set of liverwort elevational patterns encompassing a broad diversity of mountains and mountain ranges around the world. Using polynomial regression analyses, we found a prevalence of hump-shaped richness patterns (19 of 25 gradients), where liverwort species richness peaked at mid-elevation and decreased towards both ends of the gradient. Against our expectation and unlike in other plant groups, in liverworts, this pattern also applies to elevational gradients at mid-latitudes in temperate climates. Indeed, relative elevation, calculated as the percentage of the elevational range potentially inhabited by liverworts, was the most powerful predictor for the distribution of liverwort species richness. We conclude from these results that the admixture of low-and high-elevation liverwort floras, in combination with steep ecological gradients, leads to a mid-elevation floristic turnover shaping elevational patterns of liverwort diversity. Our analyses further detected significant effects of climatic variables (temperature of the warmest month, potential evapotranspiration, and precipitation of the warmest month) in explaining elevational liverwort richness patterns. This indicates that montane liverwort diversity is restricted by high temperatures and subsequent low water availability especially towards lower elevations, which presumably will lead to serious effects by temperature shifts associated with global warming.

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Ecological drivers of taxonomic, functional, and phylogenetic diversity of bryophytes in an oceanic island

Martins,

Collart,

Sim‐Sim

et al. 2024

Ecology and Evolution

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Montane oceanic islands possess unique geographic and ecological attributes, rendering them valuable for assessing patterns and drivers of alpha and beta taxonomic, functional, and phylogenetic diversity along elevational gradients. Such comparisons of diversity facets can provide insights into the mechanisms governing community assembly on islands. Herein, we aimed to characterize taxonomic, functional, and phylogenetic bryophyte diversity on Madeira Island within and across areas at varying elevations. We also assessed how these diversity facets for the alpha and beta components relate to ecological and anthropogenic factors. We estimated and compared alpha and beta taxonomic, functional, and phylogenetic diversity using 80 plots of 0.5 m × 0.5 m across the whole elevational gradient of the island. We compiled trait databases and supplemented them with our own observations. Phylogenetic information was sourced from the Moss and Liverwort Tree of Life. To assess the impact of ecological and anthropogenic factors on the three facets, we applied linear mixed‐effects models and generalized dissimilarity models to alpha‐ and beta‐diversity matrices, respectively. All facets of diversity exhibited strong correlations within both mosses and liverworts, indicating a substantial congruence when alpha and beta are analyzed separately. The bryophyte groups categorized by the growth form demonstrated contrasting patterns, aligning with their distinctive ecological requirements. While a mid‐elevation peak emerged as a common pattern across the three facets of alpha diversity, beta diversity often displayed the opposite trend. Although the relative influence of environmental factors varied depending on the diversity facet and bryophyte grouping considered, we found that alpha and beta diversity of bryophytes are more influenced by climatic factors and the predominant type of vegetation than by anthropogenic factors. In the current context of global change, these results should be interpreted with caution, but they point to the resilience of bryophytes to survive in relatively well‐preserved natural microhabitats within anthropogenic landscapes. In this study on Madeira Island, we investigated patterns and drivers of alpha and beta taxonomic, functional, and phylogenetic diversity along elevational gradients. We found that alpha and beta diversity of bryophytes are more strongly influenced by climatic factors and the predominant type of vegetation than by anthropogenic factors.

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The Two Faces of Mt Gede, Java – Species Richness, Composition and Zonation of Epiphytic Bryophytes

Cited by 5 publications

References 50 publications

Elevational patterns in tropical bryophyte diversity differ among substrates: A case study on Baru volcano, Panama

Elevational patterns in tropical bryophyte diversity differ among substrates: A case study on Baru volcano, Panama

Liverworts show a globally consistent mid‐elevation richness peak

Ecological drivers of taxonomic, functional, and phylogenetic diversity of bryophytes in an oceanic island

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