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111 results for “tree species diversity”
Diversity and conservation of saproxylic beetles in 42 European tree species: an experimental approach using early successional stages of branches
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Data from: Phylogenomic approaches reveal how climate shapes patterns of genetic diversity in an African rain forest tree species
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Data from: How tree species identity and diversity affect light transmittance to the understory in mature temperate forests
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Tree diversity reduces risk of bark beetle infestation for preferred conifer species, but increases risk for less preferred hosts
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Data from: Conservation of old individual trees and small populations is integral to maintain species’ genetic diversity of a historically fragmented woody perennial
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Data from: Capturing neutral and adaptive genetic diversity for conservation in a highly structured tree species
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Data from: Positive species diversity and above-ground biomass relationships are ubiquitous across forest strata despite interference from overstorey trees
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Data from: Tree species diversity alters plant defence investment in an experimental forest plantation in Southern Mexico
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Tree mixtures increase bird taxonomic and functional diversity over pure stands of tree species planted outside their natural range—but not over pure native stands
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Data from: Tropical tree species diversity in a mountain system in southern Mexico: local and regional patterns and determinant factors
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Data from: Interactions among trees: a key element in the stabilising effect of species diversity on forest growth
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Data from: Tree species diversity promotes litterfall productivity through crown complementarity in subtropical forests
1. The role of niche complementarity for driving the positive biodiversity-ecosystem productivity relationship has been widely recognized, but there is scant evidence regarding the role of tree canopy structure on this relationship. Litterfall productivity is proportional to forest net primary productivity in natural forests, and we hypothesized that litterfall productivity would increase with tree species diversity via increased tree crown complementarity. 2. We investigated annual litterfall productivity, species diversity, tree crown architecture, soil moisture content, soil carbon content, and stand age across 28 subtropical forest plots in eastern Zhejiang province, China. Simple linear regression was used to examine bivariate relationships among rarified species richness, crown complementarity, total crown volume, soil moisture content, soil carbon content, stand age, and litterfall productivity. Structural equation modeling was employed to quantify the direct and indirect effects of species richness on litterfall productivity through tree crown complementarity. 3. Litterfall productivity increased with rarefied species richness via increasing crown complementarity rather than total crown volume. Species richness, crown complementarity, and litterfall productivity increased with soil moisture content, while crown complementarity and litterfall productivity increased with soil carbon content. Neither species richness nor crown complementarity increased with stand age, even though litterfall productivity increased with stand age. 4. Synthesis. Our study provides evidence for a strong role of tree crown assembly in shaping ecosystem function in complex natural forests. Our findings suggest that crown spatial complementarity among trees operates mechanistically to drive the positive tree species diversity-litterfall productivity relationship in subtropical forests. We argue that community and/or ecosystem ecology would benefit from more attention to crown variability among coexisting tree species.
Stability in subtropical forests: the role of tree-species diversity, stand structure, environmental and socio-economic conditions
<p><strong>Aim: </strong>Tree species diversity can increase the stability of ecosystem productivity by increasing mean productivity and/or reducing the standard deviation in productivity. However, stand structure, environmental and socio-economic conditions influence plant diversity and may strongly influence the relationships between diversity and stability in natural forest communities. The relative importance of these factors on community stability remains poorly understood in complex (species-rich) subtropical forests.</p> <p><strong>Location: </strong>Subtropical area of southern China.</p> <p><strong>Time period: </strong>1999-2014.</p> <p><strong>Major taxa studied:</strong> Forest trees.</p> <p><strong>Methods: </strong>We conducted bivariate analyses to examine the mechanisms (overyielding and species asynchrony) underlying the effects of diversity on stability. Multiple regression models were then used to determine the relative importance of tree species diversity, stand structure, socio-economic factors and environmental conditions on stability. Structural equation modeling was used to disentangle how these variables directly and/or indirectly affect forest stability.</p> <p><strong>Results: </strong>Tree species richness exerted a positive effect on stability through overyielding and species asynchrony and this effect was stronger in mountainous forests than that in hilly forests. Species richness positively affected the mean productivity whereas species asynchrony negatively affected the variability in productivity, and hence increased forest stability. Structural diversity also had a positive effect while population density had a negative effect on stability. Precipitation variability and slope mainly indirectly influenced stability through their effects on tree species richness.</p> <p><strong>Main conclusions: </strong>Overall, tree species diversity governed stability; however stand structure, socio-economic and environmental conditions also played an important role in shaping stability in these forests. Our work highlights the importance of regulating stand structure and socio-economic factors in forest management and biodiversity conservation, to maintain and enhance their stability of providing the ecosystem services in the face of unprecedented anthropogenic activities and global climate change.</p>
Long evolutionary history of an emerging fungal pathogen of diverse tree species in eastern Asia, Australia, and the Pacific Islands
<p>Emerging plant pathogens have been increasing exponentially over the last century. To address this issue, it is critical to determine whether these pathogens are native to ecosystems or have been recently introduced. Understanding the ecological and evolutionary processes fostering emergence can help to manage their spread and predict epidemics/epiphytotics. Using restriction site-associated DNA sequencing data, we studied genetic relationships, pathways of spread, and evolutionary history of <em>Phellinus noxius</em>, an emerging root-rotting fungus of unknown origin, in eastern Asia, Australia, and the Pacific Islands. We analyzed patterns of genetic variation using Bayesian inference, maximum likelihood phylogeny, populations splits and mixtures measuring correlations in allele frequencies and genetic drift, and finally applied coalescent based theory using Approximate Bayesian computation (ABC) with supervised machine learning. Population structure analyses revealed five genetic groups with signatures of complex recent and ancient migration histories. The most probable scenario of ancient pathogen spread is movement from an unsampled population to Malaysia and the Pacific Islands, with subsequent spread to Taiwan and Australia. Furthermore, ABC analyses indicate <em>P. noxius</em> spread occurred thousands of generations ago, contradicting previous assumptions that this pathogen was recently introduced to multiple geographic regions. Our results suggest that recent emergence of <em>P. noxius</em>in eastern Asia, Australia, and the Pacific Islands is likely driven by anthropogenic and natural disturbances, such as deforestation, land-use change, severe weather events, and/or introduction of exotic plants. This study provides a novel example of applying genome-wide allele frequency data to unravel dynamics of pathogen emergence under changing ecosystem conditions.</p>
Figure 9 from: Randrianiaina R, Strauss A, Glos J, Vences M (2012) Diversity of the strongly rheophilous tadpoles of Malagasy tree frogs, genus Boophis (Anura, Mantellidae), and identification of new candidate species via larval DNA sequence and morphology. ZooKeys 178: 59-124. https://doi.org/10.3897/zookeys.178.1410
Figure 9 - Drawings of the preserved DNA voucher tadpole of Boophis sibilans (FGZC 2956-ZSM 1631/2007): A Dorsal view B Lateral view C Oral disc.
Figure 7 from: Randrianiaina R, Strauss A, Glos J, Vences M (2012) Diversity of the strongly rheophilous tadpoles of Malagasy tree frogs, genus Boophis (Anura, Mantellidae), and identification of new candidate species via larval DNA sequence and morphology. ZooKeys 178: 59-124. https://doi.org/10.3897/zookeys.178.1410
Figure 7 - Drawings of the preserved DNA voucher tadpole of Boophis schuboeae (FG/MV 2003.1800-ZSM 978/2004): A Dorsal view B Lateral view C Oral disc.
Figure 8 from: Randrianiaina R, Strauss A, Glos J, Vences M (2012) Diversity of the strongly rheophilous tadpoles of Malagasy tree frogs, genus Boophis (Anura, Mantellidae), and identification of new candidate species via larval DNA sequence and morphology. ZooKeys 178: 59-124. https://doi.org/10.3897/zookeys.178.1410
Figure 8 - Drawings of the preserved DNA voucher tadpole of Boophis albipunctatus (ZCMV 4946-ZSM 82/2008): A Dorsal view B Lateral view C Oral disc.
Figure 6 from: Randrianiaina R, Strauss A, Glos J, Vences M (2012) Diversity of the strongly rheophilous tadpoles of Malagasy tree frogs, genus Boophis (Anura, Mantellidae), and identification of new candidate species via larval DNA sequence and morphology. ZooKeys 178: 59-124. https://doi.org/10.3897/zookeys.178.1410
Figure 6 - Drawings of the preserved DNA voucher tadpole of Boophis ankaratra (ZCMV 4917-ZSM 876/2007): A Dorsal view B Lateral view C Oral disc.
Figure 5 from: Randrianiaina R, Strauss A, Glos J, Vences M (2012) Diversity of the strongly rheophilous tadpoles of Malagasy tree frogs, genus Boophis (Anura, Mantellidae), and identification of new candidate species via larval DNA sequence and morphology. ZooKeys 178: 59-124. https://doi.org/10.3897/zookeys.178.1410
Figure 5 - Drawings of the preserved DNA voucher tadpole of Boophis andohahela (T 428-ZSM 998/2007): A Dorsal view B Lateral view C Oral disc.
Figure 4 from: Randrianiaina R, Strauss A, Glos J, Vences M (2012) Diversity of the strongly rheophilous tadpoles of Malagasy tree frogs, genus Boophis (Anura, Mantellidae), and identification of new candidate species via larval DNA sequence and morphology. ZooKeys 178: 59-124. https://doi.org/10.3897/zookeys.178.1410
Figure 4 - Drawings of the preserved DNA voucher tadpole of Boophis englaenderi [Ca23](FGZC 2957-ZSM 1632/2007): A Dorsal view B Lateral view C Oral disc.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.