Only sun-lit leaves of the uppermost canopy exceed both air temperature and photosynthetic thermal optima in a wet tropical forest

Miller, Benjamin D.; Carter, Kelsey; Reed, Sasha C.; Wood, Tana E.; Cavaleri, Molly A.

doi:10.1016/j.agrformet.2021.108347

Cited by 39 publications

(43 citation statements)

References 61 publications

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“…In temperate forests, it has special parameters of temperature, humidity, light, and interspecific interactions [108][109][110]. For example, the surface of the leaves of trees can be much warmer than the air temperature in the upper part of the crown, because they intercept a large amount of incoming radiation [111][112][113]. Among other things, the complex three-dimensional structure of tree crowns provides an ecological space for reducing insect predation [114][115][116].…”

Section: Discussionmentioning

confidence: 99%

Vertical Stratification of Beetles in Deciduous Forest Communities in the Centre of European Russia

Ruchin

Egorov

2021

Diversity

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Studies on the vertical distribution of arthropods in temperate forests have revealed the uneven vertical distribution of communities. Many factors influence these patterns simultaneously. However, there are still many questions related to the vertical distribution of Coleoptera in deciduous forests of the temperate zone. The research was carried out within the territory of the Republic of Mordovia (the center of the European part of Russia). Fermental traps with a bait made of fermenting beer with sugar were used to collect Coleoptera. The collections were carried out from May to September 2020 at five sites in a deciduous forest. We set traps at a height of 1.5, 3.5, 7.5 and 12 m above the ground) on the branches of trees. Ninety-two species were identified at the end of studies at different heights. The families Nitidulidae (15 species), Cerambycidae (14 species), Elateridae (7 species), Curculionidae (7 species) and Scarabaeidae (7 species) had the greatest species diversity. The greatest species diversity was recorded at a height of 1.5 m, while the smallest one was recorded at a height of 7.5 m. The minimum number of specimens was recorded at a height of 12 m. The largest differences in the Jaccard similarity index were obtained between samples from a height of 1.5 and 12 m. The Shannon’s diversity index was higher near the ground than in the tree crowns (at heights of 7.5 and 12 m), and the Simpson index had the opposite tendency. Glischrochilus hortensis and to a lesser extent Cychramus luteus preferred to live in the lowest layers of deciduous forest (1.5 m). Cryptarcha strigata was mainly found with relatively high numbers at heights of 3.5 m and 7.5 m. The abundance and occurrence of Protaetia marmorata and Quedius dilatatus were higher in the uppermost layers of the crowns. The number of saproxylic beetle species at heights of 3.5–12 m was almost the same, while in the surface layer it decreased. The number of anthophilic beetle species was also lower at a low altitude. Our data confirm the relevance of sampling in forest ecosystems at different altitudes while studying arthropod biodiversity.

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Section: Discussionmentioning

confidence: 99%

Vertical Stratification of Beetles in Deciduous Forest Communities in the Centre of European Russia

Ruchin

Egorov

2021

Diversity

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“…The temperate canopy layer is characterized by particular microclimates. For instance, the leaf surface of trees can be much warmer than local air temperature at the top of the canopy because they intercept a large amount of incoming radiation (Woods et al, 2018;Miller et al, 2021). Leaf temperature depends on the ecophysiological traits of the plant (Pincebourde and Woods, 2012), and is consequently species specific (Leuzinger and Körner, 2007).…”

Section: Factors Shaping Arthropod Communities In the Canopy Of Temperate Forestsmentioning

confidence: 99%

Climate Change Alters Temperate Forest Canopies and Indirectly Reshapes Arthropod Communities

Sallé

Cours

Souchu

et al. 2021

Front. For. Glob. Change

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Global change challenges the adaptive potential of forests. Large-scale alterations of forest canopies have been reported across Europe, and further modifications are expected in response to the predicted changes in drought and windstorm regimes. Since forest canopies are dynamic interfaces between atmosphere and land surface, communities of canopy-dwelling insects are at the forefront of major changes in response to both direct and indirect effects of climate change. First, we briefly introduce the factors shaping arthropod communities in the canopy of temperate forests. Second, we cover the significant impacts of a forest decline on canopy structure and functioning, and more specifically its contrasted effects on insect microhabitats, trophic resources and forest microclimates. Deleterious effects may be expected for several guilds of leaf-dwelling insects. Nonetheless, a forest decline could also lead to transient or long-lasting resource pulses for other canopy-dwelling guilds, especially saproxylic species depending on deadwood substrates and tree-related microhabitats. The novel microclimates may also become more favorable for some particular groups of insects. We pinpoint current knowledge gaps and the technological locks that should be undone to improve our understanding of the canopy biotope and biodiversity in temperate forests. We highlight the need for integrative approaches to reveal the mechanisms at play. We call for cross-scale studies and long-term collaborative research efforts, involving different disciplines such as community and disturbance ecology, plant and insect ecophysiology, and thermal ecology, to better anticipate ongoing functional and conservation issues in temperate forest ecosystems.

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“…Water is crucial to maintain g S for leaf cooling via evapotranspiration, and therefore is associated with the cooling benefits of trees even under extreme high temperatures (Drake et al, 2018). Leaf temperature is an important parameter; a decrease in g S can be associated with increases in leaf temperatures (Lu et al, 1994) and leaf temperatures can exceed air temperature by several degrees (Miller et al, 2021) leading to leaf damage (Hueve et al, 2011). Thus, identifying resistant species to high temperatures in water-limited environments is beneficial in urban environments because canopy loss can have negative environmental and social impacts (e.g., decrease in cooling benefits) (Sanusi and Livesley, 2020).…”

Section: Discussionmentioning

confidence: 99%

Ecophysiological Vulnerability to Climate Change in Mexico City’s Urban Forest

Barradas

Esperón-Rodríguez

2021

Front. Ecol. Evol.

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Urban forests play an important role in regulating urban climate while providing multiple environmental services. These forests, however, are threatened by changes in climate, as plants are exposed not only to global climate change but also to urban climate, having an impact on physiological functions. Here, we selected two physiological variables (stomatal conductance and leaf water potential) and four environmental variables (air temperature, photosynthetically active radiation, vapor pressure deficit, and water availability) to compare and evaluate the ecophysiological vulnerability to climate change of 15 dominant tree species from Mexico City’s urban forest. The stomatal conductance response was evaluated using the boundary-line analysis, which allowed us to compare the stomatal response to changes in the environment among species. Our results showed differential species responses to the environmental variables and identified Buddleja cordata and Populus deltoides as the least and most vulnerable species, respectively. Air temperatures above 33°C and vapor pressure deficit above 3.5 kPa limited the stomatal function of all species. Stomatal conductance was more sensitive to changes in leaf water potential, followed by vapor pressure deficit, indicating that water is a key factor for tree species performance in Mexico City’s urban forest. Our findings can help to optimize species selection considering future climate change by identifying vulnerable and resilient species.

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Only sun-lit leaves of the uppermost canopy exceed both air temperature and photosynthetic thermal optima in a wet tropical forest

Cited by 39 publications

References 61 publications

Vertical Stratification of Beetles in Deciduous Forest Communities in the Centre of European Russia

Vertical Stratification of Beetles in Deciduous Forest Communities in the Centre of European Russia

Climate Change Alters Temperate Forest Canopies and Indirectly Reshapes Arthropod Communities

Ecophysiological Vulnerability to Climate Change in Mexico City’s Urban Forest

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