Evaluating Adaptive Management Options for Black Ash Forests in the Face of Emerald Ash Borer Invasion

Forests, Journal Year: 2018, Volume and Issue: 9(6), P. 348 - 348

Published: June 13, 2018

The arrival and spread of emerald ash borer (EAB) across the western Great Lakes region has shifted considerable focus towards developing silvicultural strategies that minimize impacts this invasive insect on structure functioning black (Fraxinus nigra) wetlands. Early experience with clearcutting in these forests highlighted risks losing to EAB from ecosystems, stands often retrogressing marsh-like conditions limited tree cover. Given experiences an urgency for increasing resilience EAB, research efforts began north-central Minnesota 2009 followed by additional studies trials Michigan Wisconsin evaluate potential using regeneration harvests conjunction planting replacement species sustain forested wetland habitats after infestations. Along more formal experiments, a number field demonstrations have been employed managers determine effective ways reducing vulnerability forest types EAB. This paper reviews results recent managing describes insights gained ecological unique, foundational role played ash.

Language: Английский

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Developing and integrating tactics to slow ash (Oleaceae) mortality caused by emerald ash borer (Coleoptera: Buprestidae)

The Canadian Entomologist, Journal Year: 2015, Volume and Issue: 147(3), P. 349 - 358

Published: March 17, 2015

Abstract Practical and effective strategies to manage emerald ash borer (EAB) ( Agrilus planipennis Fairmaire; Coleoptera: Buprestidae) are increasingly important given economic ecological impacts of this invader. While EAB detection remains challenging, tactics available protect individual Fraxinus Linnaeus; Oleaceae) trees slow population growth, thereby delaying mortality. Simulations with a coupled map lattice model, parameterised data from numerous field studies, showed treating highly systemic insecticide (TREE-äge™; emamectin benzoate), would be more in slowing growth than girdling attract ovipositing females then destroying before larvae develop, while harvesting reduce phloem have the least effect. From 2008 2012, cooperators participated pilot project implement an integrated strategy for infestation Upper Michigan, United States America. Ash was inventoried density monitored using girdled supplemented baited artificial traps across >750 km 2 area. only tiny fraction area were (444–855 annually) or injected TREE-äge™ (<360 roadside annually), treatment distribution restricted, both treatments slowed growth. Coupling injections other will likely yield additive synergistic outcomes.

Language: Английский

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The green ash transcriptome and identification of genes responding to abiotic and biotic stresses

BMC Genomics, Journal Year: 2016, Volume and Issue: 17(1)

Published: Sept. 2, 2016

To develop a set of transcriptome sequences to support research on environmental stress responses in green ash (Fraxinus pennsylvanica), we undertook deep RNA sequencing tissues under various treatments. The treatments, including emerald borer (EAB) feeding, heat, drought, cold and ozone, were selected mimic the increasing threats climate change invasive pests faced by across its native habitat. We report generation assembly from 55 samples into 107,611 putative unique transcripts (PUTs). 52,899 open reading frames identified. Functional annotation PUTs comparison Uniprot protein database identified matches for 63 % 98 with ORFs. Further functional conserved domains assigned gene ontology terms PUTs. Examination transcript expression different libraries revealed that patterns clustered based regardless treatment. treatments further examined identify differential expression. Tens hundreds differentially expressed each A 109 found be consistently up or down regulated three more representing basal response candidate genes ash. In addition, 1956 simple sequence repeats PUTs, which 465 high quality DNA markers designed flanking PCR primers. North American trees have suffered extensive mortality due EAB infestation, creating need breed select resistant genotypes. Stress is an additional concern longevity populations. use genomics could accelerate management efforts. developed provides important information, genetic stress-response genes.

Language: Английский

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Sprouting and seed production may promote persistence of green ash in the presence of the emerald ash borer

Ecosphere, Journal Year: 2016, Volume and Issue: 7(4)

Published: April 1, 2016

Abstract Invasive insects and pathogens have had major impacts on many forest tree species in North America that often affect structure composition. Despite these effects, variation exists the likelihood some native may persist following outbreaks establishment of exotic pathogens. Emerald ash borer ( EAB ; Agrilus planipennis ) has killed millions trees near its introduction point southeastern Michigan, several recent studies area predicted functional elimination green Fraxinus pennsylvanica from landscape. Intensive management yet unaffected stands results such predictions, however, demands data examine potential for persistence host presence invasive. This study examined by measuring surviving trees, regeneration, seed rain characteristics 17 small, near‐pure five consecutive growing seasons. Live experienced 58% mortality due to , significantly less than reported mixed stands. Approximately 20% exhibited signs confirming slowed but is ongoing. Sprouting was dominant mode regeneration every year, 27% large sprouts produced seeds during a mast year 2011. Advanced new seedling resulted sizable level over years even when sapling taken into account. Seed production reduced considerably ‐caused mortality, there no evidence dispersal limited recruitment. These suggest seed‐producing ability small basal sprouts, as well continued low‐level will retain density, allow . Although populations individual are unlikely ever resemble stature those prior their continue be an important component forests

Language: Английский

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Spatial vulnerability assessment of silver fir and Norway spruce dieback driven by climate warming

Landscape Ecology, Journal Year: 2022, Volume and Issue: 38(2), P. 341 - 361

Published: Dec. 24, 2022

Language: Английский

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