Evaluating quantitative pollen representation of vegetation in the tropics: A case study on the Hainan Island, tropical China

Wan, Qiong; Zhang, Yaze; Huang, Kangyou; Sun, Qianwen; Zhang, Xiao; Gaillard, Marie-José; Xu, Qinghai; Li, Furong; Zheng, Zhuo

doi:10.1016/j.ecolind.2020.106297

Cited by 16 publications

(19 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, other arboreal pollen taxa that are frequently found in the natural tropical forests of East Asia, including Randia, Aphanamixis, Sterculia, Symplocos, Antidesma, Theaceae, and so forth, become quite rare in the pollen spectra since 2 ka. Pollen assemblages of modern surface soil samples suggest that these important taxa, characteristic of tropical forests, are rare or even absent in both cultivated lands and recovered secondary woodlands (19). Our results indicate that this character of floral biodiversity decline probably traces back to 2 ka.…”

Section: Resultsmentioning

confidence: 68%

“…The latest pollen productivities study in Hainan Island (19), which presents by far the most detailed pollen-vegetation survey from the northern part of tropical southeastern Asia, indicates that, at a regional scale-although there were differences between the modern pollen assemblages and related vegetation composition-the pollen types identified in surface soil samples captured the majority of investigated plant types (∼65%) at the family level. Moreover, this modern survey suggests that pollen assemblages of cultivated lands can be distinguished from recovered secondary woodlands, indicating that information of agriculture-induced vegetation change can be captured in pollen records in this part of the tropics (19).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Anthropogenic impacts on Late Holocene land-cover change and floristic biodiversity loss in tropical southeastern Asia

Zheng

Roberts

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

View full text Add to dashboard Cite

Southern China and Southeast Asia witnessed some of their most significant economic and social changes relevant to human land use during the Late Holocene, including the intensification and spread of rice agriculture. Despite rice growth being associated with a number of earth systems impacts, how these changes transformed tropical vegetation in this region of immense endemic biodiversity remains poorly understood. Here, we compile a pollen dataset incorporating ∼150,000 identifications and 233 pollen taxa to examine past changes in floral biodiversity, together with a compilation of records of forest decline across the region using 14 pollen records spanning lowland to mountain sites. Our results demonstrate that the rise of intensive rice agriculture from approximately 2,000 y ago led not only to extensive deforestation but also to remarkable changes of vegetation composition and a reduction in arboreal diversity. Focusing specifically on the Tertiary relic tree species, the freshwater wetland conifer Glyptostrobus (Glyptostrobus pensilis), we demonstrate how key species that had survived changing environmental conditions across millions of years shrank in the face of paddy rice farming and human disturbance.

show abstract

Section: Resultsmentioning

confidence: 68%

mentioning

confidence: 99%

Anthropogenic impacts on Late Holocene land-cover change and floristic biodiversity loss in tropical southeastern Asia

Zheng

Roberts

et al. 2021

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Most dispersal studies to date are based on the Prentice-Sutton model (Prentice, 1985), which assumes that pollen grains are transported in the atmosphere in a similar way to groundlevel Gaussian plumes. However, it has been suggested that a Lagrangian stochastic model may better capture the outcome of long-distance pollen dispersal (Kuparinen et al, 2007;Theuerkauf et al, 2013Theuerkauf et al, , 2016 although not everywhere, Wan et al, 2020); more tests on different regions and models are needed. Because multiple physical processes govern pollen transport, a single mechanistic model or dispersal kernel may ultimately be elusive (Jackson & Lyford, 1999).…”

Section: Addressing Long-standing Challengesmentioning

confidence: 99%

Estimation of pollen productivity and dispersal: How pollen assemblages in small lakes represent vegetation

Liu

Ogle

Lichstein

et al. 2022

Ecological Monographs

View full text Add to dashboard Cite

Quantitative understanding of vegetation dynamics over timespans beyond a century remains limited. In this regard, the pollen-based reconstruction of past vegetation enables unique research opportunities by quantifying changes in plant community compositions during hundreds to thousands of years. Critically, the methodological basis for most reconstruction approaches rests upon estimates of pollen productivity and dispersal. Previous studies, however, have reached contrasting conclusions concerning these estimates, which may be perceived to challenge the applicability and reliability of pollen-based reconstruction. Here we show that conflicting estimates of pollen production and dispersal are, at least in part, artifacts of fixed assumptions of pollen dispersal and insufficient spatial resolution of vegetation data surrounding the pollencollecting lake. We implemented a Bayesian statistical model that related pollen assemblages in surface sediments of 33 small lakes (<2 ha) in the northeastern United States, with surrounding vegetation ranging from 10 1 to >10 5 m from the lake margin. Our analysis revealed three key insights. First, pollen productivity is largely conserved within taxa and across forest types. Second, when local (within a 1-km radius) vegetation abundances are not considered, pollen-source areas may be overestimated for some common taxa (Cupressaceae, Pinus, Quercus, and Tsuga). Third, pollen dispersal mechanisms may differ between local and regional scales; this is missed by pollendispersal models used in previous studies. These findings highlight the complex interactions between vegetation heterogeneity on the landscape and pollen dispersal. We suggest that, when estimating pollen productivity and dispersal, both detailed local and extended regional vegetation must be taken into account. Also, both deductive (mechanistic models) and inductive (statistical models) approaches are needed to better understand the emergent properties of pollen dispersal in heterogeneous landscapes.

show abstract

“…However, some studies have estimated Relative Pollen Productivity (RPP) of major taxa in tropical and subtropical regions of the world (e.g. Jiang et al 2020;Wan et al 2020), including two studies in South Africa Hill et al, this volume) and one study in Namibia (Tabares et al 2021). Here we present results from a pilot study in Cameroon testing methods and models previously used and validated in the northern Hemisphere, i.e.…”

Section: Introduction: the Challengementioning

confidence: 99%

Quaternary Vegetation Dynamics – The African Pollen Database

Runge¹,

Gosling²,

Lézine³

et al. 2021

View full text Add to dashboard Cite

The right of the Editors to be identified as the author of the editorial material, and of the authors for their individual chapters, has been asserted in accordance with sections 77 and 78 of the Copyright, Designs and Patents Act 1988.The Open Access version of this book, available at www.taylorandfrancis.com, has been made available under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license. Although all care is taken to ensure integrity and the quality of this publication and the information herein, no responsibility is assumed by the publishers nor the author for any damage to the property or persons as a result of operation or use of this publication and/or the information contained herein.

show abstract

Evaluating quantitative pollen representation of vegetation in the tropics: A case study on the Hainan Island, tropical China

Cited by 16 publications

References 45 publications

Anthropogenic impacts on Late Holocene land-cover change and floristic biodiversity loss in tropical southeastern Asia

Anthropogenic impacts on Late Holocene land-cover change and floristic biodiversity loss in tropical southeastern Asia

Estimation of pollen productivity and dispersal: How pollen assemblages in small lakes represent vegetation

Quaternary Vegetation Dynamics – The African Pollen Database

Contact Info

Product

Resources

About