The effect of drought on wood-boring in trees and saplings in tropical rainforests

Gely, Claire; Laurance, Susan G.; Stork, Nigel E.

doi:10.1016/j.foreco.2021.119078

Cited by 3 publications

(6 citation statements)

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“…The effect of drought stress on insects is complex and depends on multiple factors. For instance, insects feeding on trees may respond to drought quite differently than insects feeding on smaller plants such as forbs, sedges and grasses (Gely et al, 2021). During the summer, drought episodes can decrease herbivorous insect populations on small plants because these are more prone to water stress, and this in turn will lead to a scarcity in food resources that in turn has severe consequences in terms of population dynamics and of interspecific interactions.…”

Section: Droughtmentioning

confidence: 99%

“…Insect responses to an experimental drought in a tropical rainforest of North Queensland, Australia, showed variable responses among different feeding guilds (Gely, 2021). In the experimentally droughted area, there was significantly more wood borer damage to trees than in the control area (Gely et al, 2021). Many ant species in Australian rainforests take nectar from extrafloral nectaries whereas some also rely on aphid honeydew.…”

Section: Effects Of Short‐term Unpredictable Climate Extremes On Insectsmentioning

confidence: 99%

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Scientists' warning on climate change and insects

Harvey

Tougeron

Gols

et al. 2022

Ecological Monographs

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185

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Section: Droughtmentioning

confidence: 99%

Section: Effects Of Short‐term Unpredictable Climate Extremes On Insectsmentioning

confidence: 99%

Scientists' warning on climate change and insects

Harvey

Tougeron

Gols

et al. 2022

Ecological Monographs

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185

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“…On the other hand, previously existing, size‐dependent pathogen‐induced damage (Klesse et al ., 2021) and parasitic‐plant presence, such as mistletoe (which preferentially infects dominant trees), may debilitate tree response to and exacerbate water stress during drought and thus promote mortality through carbon starvation and/or hydraulic failure or predispose trees to further biotic attacks (Kolb et al ., 2016; Fernández‐de‐Uña et al ., 2017; Erbilgin et al ., 2021). Drought has been found to predispose trees to bark beetle (Netherer et al ., 2015) and other pest insect attacks (Gely et al ., 2021), with large‐scale bark beetle outbreaks often being preceded by drought (Christiansen et al ., 1987). Ensuing damage has been found to be greater in both large trees (bark beetle‐associated fungus, Öhrn et al ., 2021) and small ones (wood boring insects, Gely et al ., 2021), depending on the infecting species.…”

Section: Potential Implications Of Tree Height On Vulnerability To Dr...mentioning

confidence: 99%

“…Drought has been found to predispose trees to bark beetle (Netherer et al ., 2015) and other pest insect attacks (Gely et al ., 2021), with large‐scale bark beetle outbreaks often being preceded by drought (Christiansen et al ., 1987). Ensuing damage has been found to be greater in both large trees (bark beetle‐associated fungus, Öhrn et al ., 2021) and small ones (wood boring insects, Gely et al ., 2021), depending on the infecting species. Drought may also compound the effect of beetle attack and bark‐beetle‐associated fungi alone by accelerating or enhancing carbon depletion, thus promoting tree death (Kolb et al ., 2019; Stephenson et al ., 2019; Erbilgin et al ., 2021).…”

Section: Potential Implications Of Tree Height On Vulnerability To Dr...mentioning

confidence: 99%

The role of height‐driven constraints and compensations on tree vulnerability to drought

et al. 2023

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SummaryFrequent observations of higher mortality in larger trees than in smaller ones during droughts have sparked an increasing interest in size‐dependent drought‐induced mortality. However, the underlying physiological mechanisms are not well understood, with height‐associated hydraulic constraints often being implied as the potential mechanism driving increased drought vulnerability. We performed a quantitative synthesis on how key traits that drive plant water and carbon economy change with tree height within species and assessed the implications that the different constraints and compensations may have on the interacting mechanisms (hydraulic failure, carbon starvation and/or biotic‐agent attacks) affecting tree vulnerability to drought. While xylem tension increases with tree height, taller trees present a range of structural and functional adjustments, including more efficient water use and transport and greater water uptake and storage capacity, that mitigate the path‐length‐associated drop in water potential. These adaptations allow taller trees to withstand episodic water stress. Conclusive evidence for height‐dependent increased vulnerability to hydraulic failure and carbon starvation, and their coupling to defence mechanisms and pest and pathogen dynamics, is still lacking. Further research is needed, particularly at the intraspecific level, to ascertain the specific conditions and thresholds above which height hinders tree survival under drought.

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“…This study, led by Professor Susan Laurance, is looking at tree and sapling responses to drought (Tng et al, 2018) and what may kill droughted trees. A new model examining how different guilds of insects respond to drought (Gely et al, 2019) is now being tested, with first results indicating that there are significantly more trees with wood borer damage in the droughted area compared to the control (Gely et al, 2021).…”

Section: Research At the Canopy Cranementioning

confidence: 99%

The Daintree Canopy Crane: Conception, Installation and Operation

Stork¹

2021

Proc. R. Soc. Qld.

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The forest canopy is where the biosphere meets the atmosphere, and yet it has been poorly understood due to its inaccessibility. In the early 1990s, interest in the canopy of forests was increasing and researchers sought to attain greater access through the use of industrial cranes. In 1998 a crane was lowered, section by section, by helicopter and constructed in an area of lowland rainforest in the Daintree area of North Queensland. The constructed crane is 47 m high with a 55 m length jib providing access to the canopy of forest covering almost a hectare and including roughly 680 tree stems >10 cm DBH of 82 species. Since its installation, the crane has been used to provide novel insights into a range of fields including plant ecology and physiology, forest microclimate, and faunal and floral diversity. There has been a strong focus on insects including pollination and ant ecology, vertical distribution of insects from the ground to upper canopy, and the hidden diversity of insects and flowers. Current research using the crane is largely focused on the impacts of experimentally induced drought on trees and saplings and the consequences for insects. This paper describes the installation of the crane and initial management and functioning of the research facility. It provides insights on how best to install a canopy crane and maximise its use, as well as the pitfalls to avoid. Also addressed are the potential experimental problems posed by having a single site facility.

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The effect of drought on wood-boring in trees and saplings in tropical rainforests

Cited by 3 publications

References 47 publications

Scientists' warning on climate change and insects

Scientists' warning on climate change and insects

The role of height‐driven constraints and compensations on tree vulnerability to drought

The Daintree Canopy Crane: Conception, Installation and Operation

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