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Differential nutrie...
Differential nutrient limitation and tree height control leaf physiology, supporting niche partitioning in tropical dipterocarp forests
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- Bartholomew, David (författare)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap,College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom
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- Banin, Lindsay F. (författare)
- UK Centre for Ecology & Hydrology, Midlothian, United Kingdom
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- Bittencourt, Paulo R. L. (författare)
- College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom
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- Suis, Mohd Aminur Faiz (författare)
- Forest Research Centre, Sabah Forestry Department, Sabah, Malaysia
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- Mercado, Lina M. (författare)
- College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom; UK Centre for Ecology & Hydrology, Wallingford, United Kingdom
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- Nilus, Reuben (författare)
- Forest Research Centre, Sabah Forestry Department, Sabah, Malaysia
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- Burslem, David F. R. P. (författare)
- School of Biological Sciences, University of Aberdeen, Aberdeen, United Kingdom
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- Rowland, Lucy (författare)
- College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom
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(creator_code:org_t)
- 2022-06-29
- 2022
- Engelska.
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Ingår i: Functional Ecology. - : John Wiley & Sons. - 0269-8463 .- 1365-2435. ; 36:8, s. 2084-2103
- Relaterad länk:
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https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 1. Revealing the mechanisms of environmental niche partitioning within lowland tropical forests is important for understanding the drivers of current species distributions and potential vulnerability to environmental change. Tropical forest structure and species composition change across edaphic gradients in Borneo over short distances. However, our understanding of how edaphic conditions affect tree physiology and whether these relationships drive niche partitioning within Bornean forests remains incomplete.2. This study evaluated how leaf physiological function changes with nutrient availability across a fine-scale edaphic gradient and whether these relationships vary according to tree height. Furthermore, we tested whether intraspecific leaf trait variation allows generalist species to populate a wider range of environments.3. We measured leaf traits of 218 trees ranging in height from 4 to 66 m from 13 dipterocarp species within four tropical forest types (alluvial, mudstone, sandstone and kerangas) occurring along an <5 km edaphic gradient in North Borneo. The traits measured included saturating photosynthesis (Asat), maximum photosynthetic capacity (Vcmax), leaf dark respiration (Rleaf), leaf mass per area (LMA), leaf thickness, minimum stomatal conductance (gdark) and leaf nutrient concentrations (N, P, Ca, K and Mg).4. Across all species, leaf traits varied consistently in response to soil nutrient availability across forest types except Rleaf_mass, [Mg]leaf and [Ca]leaf. Changes in photosynthesis and respiration rates were related to different leaf nutrients across forest types, with greater nutrient-use efficiency in more nutrient-poor environments. Generalist species partially or fully compensated reductions in mass-based photosynthesis through increasing LMA in more nutrient-poor environments.5. Leaf traits also varied with tree height, except Vcmax_mass, but only in response to height-related modifications of leaf morphology (LMA and leaf thickness). These height–trait relationships did not vary across the edaphic gradient, except for Asat, [N]leaf, [P]leaf and [K]leaf.6. Our results highlight that modification of leaf physiological function and morphology act as important adaptations for Bornean dipterocarps in response to edaphic and vertical environmental gradients. Meanwhile, multiple nutrients appear to contribute to niche partitioning and could drive species distributions and high biodiversity within Bornean forest landscapes. Read the free Plain Language Summary for this article on the Journal blog.
Ämnesord
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Nyckelord
- Borneo
- generalist
- leaf respiration
- leaf traits
- ontogeny
- photosynthetic capacity
- rainforest
- trait plasticity
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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