Dominant temperate and subalpine Japanese trees have variable photosynthetic thermal optima according to site mean annual temperature

Kobayashi, Yuta; Haga, Chihiro; Shinohara, Naoto; Nishizawa, Keita; Mori, Akira

doi:10.1111/geb.13636

Cited by 4 publications

(3 citation statements)

References 59 publications

(104 reference statements)

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“…The impact of WPE on POS was primarily controlled by winter precipitation, summer temperature, and summer precipitation. Summer warming promotes photosynthesis by enhancing enzyme activity and cell growth, facilitating the arrival of the POS ( Huang et al., 2019 ; Kobayashi et al., 2023 ). Conversely, increases in summer precipitation elevate soil moisture, leading to anaerobic respiration and accumulation of harmful substances, inhibiting plant growth ( Sasidharan et al., 2018 ).…”

Section: Discussionmentioning

confidence: 99%

Woody encroachment induced earlier and extended growing season in boreal wetland ecosystems

Sun,

Wang,

Liu

et al. 2024

Front. Plant Sci.

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Woody plant encroachment (WPE), a widespread ecological phenomenon globally, has significant impacts on ecosystem structure and functions. However, little is known about how WPE affects phenology in wetland ecosystems of middle and high latitudes. Here, we investigated the regional-scale effects of WPE on the start (SOS), peak (POS), end (EOS), and length (GSL) of the growing season in boreal wetland ecosystems, and their underlying mechanisms, using remote sensing dataset during 2001–2016. Our results showed that WPE advanced the annual SOS and POS, while delaying EOS and extending GSL in boreal wetlands with these impacts increasing over time. When boreal wetland ecosystems were fully encroached by woody plants, the SOS and POS were advanced by 12.17 and 5.65 days, respectively, the EOS was postponed by 2.74 days, and the GSL was extended by 15.21 days. We also found that the impacts of WPE on wetland SOS were predominantly attributed to the increased degree of WPE (α), while climatic factors played a more significant role in controlling the POS and EOS responses to WPE. Climate change not only directly influenced phenological responses of wetlands to WPE but also exerted indirect effects by regulating soil moisture and α. Winter precipitation and spring temperature primarily determined the effects of WPE on SOS, while its impacts on POS were mainly controlled by winter precipitation, summer temperature, and precipitation, and the effects on EOS were mainly determined by winter precipitation, summer temperature, and autumn temperature. Our findings offer new insights into the understanding of the interaction between WPE and wetland ecosystems, emphasizing the significance of considering WPE effects to ensure accurate assessments of phenology changes.

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Section: Discussionmentioning

confidence: 99%

Woody encroachment induced earlier and extended growing season in boreal wetland ecosystems

Sun,

Wang,

Liu

et al. 2024

Front. Plant Sci.

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“…We analyzed the national vegetation dataset obtained from the Ministry of the Environment of Japan (http://www.biodic.go.jp, accessed 15 April 2021). The surveys were conducted from 2000 to 2019 using the phytosociological method, which involved recording coverage classes (labelled as 0.1, 1, 2, 3, 4 or 5, in order of increasing dominance) of plant species at each layer (labelled as 1–7, from the forest canopy to the moss layer) (Kobayashi et al 2023). Our analyses focused solely on tree species because EcM mycorrhizal associations are typically reported for tree species (Soudzilovskaia et al 2020).…”

Section: Methodsmentioning

confidence: 99%

Plant–mycorrhizal associations may explain the latitudinal gradient of plant community assembly

Shinohara,

Kobayashi,

Nishizawa

et al. 2024

Oikos

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Biogeographical variation in community assembly processes forms the basis of the latitudinal gradient of biodiversity by driving β‐diversity. Classical studies on community assembly predict environmental filtering affecting β‐diversity more strongly at higher latitudes, where productivity is lower and abiotic stress is stronger. Contrary to this prediction, recent evidence indicates that plant community composition at higher latitudes exhibits more spatially clustered distributions independently of background environments, suggesting the importance of spatial processes, such as priority effects. In this study, we propose a hypothesis that resolves this paradox by considering plant–soil feedback and biogeographic variations in the dominant mycorrhizal type: we predict that the increasing prevalence of ectomycorrhizal (EcM) trees with latitude contributes to the spatially clustered distribution of plants, as EcM trees tend to exhibit positive plant–soil feedback. We analyzed a large‐scale standardized dataset of Japanese forests covering a latitudinal gradient of >10° and found that 1) the proportion of EcM trees was higher at higher latitudes, and 2) EcM tree‐rich communities exhibited more spatially clustered distributions likely due to positive plant–soil feedback. Consequently, 3) tree species composition at higher latitudes was better explained by spatial variables suggesting the importance of priority effects. Consistent with the predictions of the plant–soil feedback theory, these patterns were more pronounced in understory than in canopy communities. Taken together, our results lend support to our hypothesis that biogeographic variation in tree community assembly patterns is defined by mycorrhizal types and plant–soil feedback, thereby resolving a paradox in the latitudinal gradient of plant community assembly. Our work highlights that plant mycorrhizal type underlies the determinants of β‐diversity which is a critical component of the latitudinal gradient of diversity.

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“…We analyzed the national vegetation dataset obtained from the Ministry of the Environment of Japan (www.biodic.go.jp, accessed on April 15, 2021). The surveys were conducted from 2000 to 2019 using the phytosociological method, which involved recording coverage classes (labeled as 0.1, 1, 2, 3, 4, or 5, in order of increasing dominance) of plant species at each layer (labeled as 1 to 7, from the forest canopy to the moss layer) (Kobayashi et al 2023). Our analyses focused solely on tree species because EcM mycorrhizal associations are typically reported for tree species (Soudzilovskaia et al 2020).…”

Section: Data Collectionmentioning

confidence: 99%

Plant-mycorrhizal associations may explain the latitudinal gradient of plant community assembly

Shinohara

Kobayashi

Nishizawa

et al. 2023

Preprint

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Biogeographical variation in community assembly patterns forms the basis of large-scale biodiversity gradients. Previous studies on community assembly have suggested the dominant role of environmental filtering at higher latitudes. However, recent evidence indicates that plant community distributions at higher latitudes exhibit more spatial clustering, suggesting the importance of spatial assembly processes. In this study, we propose a hypothesis that resolves this paradox by incorporating biogeographic variations in dominant mycorrhizal types: the increasing prevalence of ectomycorrhizal (EcM) trees with latitude contributes to the spatially clustered distribution of plants, as EcM trees tend to exhibit positive plant-soil feedback. We analyzed a large-scale standardized dataset of Japanese forests covering a latitudinal gradient of >10 and found that (i) the proportion of EcM trees was higher at higher latitudes, and (ii) EcM tree-rich communities exhibited more spatially clustered distributions. Consequently, (iii) the tree species composition at higher latitudes was better explained by spatial variables. Moreover, consistent with predictions derived from the plant-soil feedback theory, these findings were particularly evident in the understory rather than the canopy communities. This study demonstrates that plant-soil feedback influences plant community distributions at metacommunity scales, thereby giving rise to a paradox within the latitudinal gradient of plant community assembly.

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Dominant temperate and subalpine Japanese trees have variable photosynthetic thermal optima according to site mean annual temperature

Cited by 4 publications

References 59 publications

Woody encroachment induced earlier and extended growing season in boreal wetland ecosystems

Woody encroachment induced earlier and extended growing season in boreal wetland ecosystems

Plant–mycorrhizal associations may explain the latitudinal gradient of plant community assembly

Plant-mycorrhizal associations may explain the latitudinal gradient of plant community assembly

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