Academic Journal
Exploring spatio-temporal patterns of palynological changes in Asia during the Holocene
| العنوان: | Exploring spatio-temporal patterns of palynological changes in Asia during the Holocene |
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| المؤلفون: | Bhatta, Kuber Prasad, Mottl, Ondrej, Felde, Vivian Astrup, Flantua, Suzette, Birks, Hilary H, Cao, Xianyong, Chen, Fahu, Grytnes, John Arvid, Seddon, Alistair William Robin, Birks, Harry John Betteley |
| المصدر: | 1115784 ; Frontiers in Ecology and Evolution ; 11 |
| بيانات النشر: | Frontiers |
| سنة النشر: | 2023 |
| المجموعة: | University of Bergen: Bergen Open Research Archive (BORA-UiB) |
| الوصف: | Historical legacies influence present-day ecosystem composition and dynamics. It is therefore important to understand the long-term dynamics of ecosystems and their properties. Analysis of ecosystem properties during the Holocene using fossil pollen assemblages provides valuable insights into past ecosystem dynamics by summarising so-called pollen-assemblage properties (PAPs). Using 205 fossil pollen data-sets (records), we quantify eight PAPs [pollen-taxonomic richness, diversity, evenness, pollen-compositional turnover, pollen-compositional change, and rate of pollen-compositional change (RoC)] for the Asian continent at different spatial scales (in individual records, within and across climate-zones, and within the continent) and time (temporal patterns over the past 12,000 years). Regression tree (RT) partitioning of the PAP-estimates using sample-age as a sole predictor revealed the “change-point(s)” (time or sample-age of major change in a PAP). We estimated the density of RT and multivariate regression tree (MRT) change-points in 1,000-year time bins during the Holocene. Pollen-compositional turnover (range of sample scores along the first DCCA axis) and change (number of MRT partitions) in each record reveal gradual spatial variation across latitude and a decline with longitude eastward. Temporally, compositional turnover declines linearly throughout the Holocene at all spatial scales. Other PAPs are heterogeneous across and within spatial scales, being more detectable at coarser scales. RT and MRT change-point density is broadly consistent in climate-zones and the continent, increasing from the early- to mid-Holocene, and mostly decrease from the mid-Holocene to the present for all PAPs. The heterogenous patterns in PAPs across the scales of study most likely reflect responses to variations in regional environmental conditions, anthropogenic land-use, and their interactions over space and time. Patterns at the climate-zone and continental scales indicate a gradual but congruent decline in major PAPs ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 2296-701X |
| Relation: | EC/H2020/741413; urn:issn:2296-701X; https://hdl.handle.net/11250/3074733; https://doi.org/10.3389/fevo.2023.1115784; cristin:2154461; Frontiers in Ecology and Evolution. 2023, 11, 1115784. |
| DOI: | 10.3389/fevo.2023.1115784 |
| الاتاحة: | https://hdl.handle.net/11250/3074733 https://doi.org/10.3389/fevo.2023.1115784 |
| Rights: | Navngivelse 4.0 Internasjonal ; http://creativecommons.org/licenses/by/4.0/deed.no ; Copyright 2023 the authors |
| رقم الانضمام: | edsbas.40396869 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 2296701X |
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| DOI: | 10.3389/fevo.2023.1115784 |