Disentangling the abundance–impact relationship for invasive species

Proceedings of the National Academy of Sciences, Journal Year: 2019, Volume and Issue: 116(20), P. 9919 - 9924

Published: April 29, 2019

To predict the threat of biological invasions to native species, it is critical that we understand how increasing abundance invasive alien species (IAS) affects populations and communities. The form this relationship across taxa ecosystems unknown, but expected depend strongly on trophic position IAS relative species. Using a global metaanalysis based 1,258 empirical studies presented in 201 scientific publications, assessed shape, direction, strength responses invader abundance. We also tested varied with for at population vs. community levels. As increased, declined nonlinearly by 20%, average, metrics linearly 25%. When higher levels, invaders tended cause strong, nonlinear decline communities, greatest impacts occurring low In contrast, same level linear while lower levels had no consistent impacts. At level, significantly larger effects evenness diversity than richness. Our results show invasion critically species’ position. Further, these general abundance–impact relationships reveal are likely develop during process when best manage them.

Language: Английский

---

Trophic rewilding as a restoration approach under emerging novel biosphere conditions

Current Biology, Journal Year: 2024, Volume and Issue: 34(9), P. R435 - R451

Published: May 1, 2024

Language: Английский

---

Nonnative plants reduce population growth of an insectivorous bird

Proceedings of the National Academy of Sciences, Journal Year: 2018, Volume and Issue: 115(45), P. 11549 - 11554

Published: Oct. 22, 2018

Human-dominated landscapes represent one of the most rapidly expanding and least-understood ecosystems on earth. Yet, we know little about which features in these promote sustainable wildlife populations. Historically, urban areas, landowners have converted native plant communities into habitats dominated by nonnative species that are not susceptible to pest damage require maintenance. However, plants also poor at supporting insects critical food resources for higher order consumers. Despite logical connection, no study has examined impact subsequent population responses vertebrate Here, demonstrate residential yards lower arthropod abundance, forcing resident Carolina chickadees ( Poecile carolinensis ) switch diets less preferred prey produce fewer young, or forgo reproduction sites altogether. This leads reproductive success unsustainable growth compared with those >70% biomass. Our results reveal properties landscaped function as sinks insectivorous birds. To webs, planners private should prioritize species.

Language: Английский

---

How ecosystems change following invasion by Robinia pseudoacacia: Insights from soil chemical properties and soil microbial, nematode, microarthropod and plant communities

The Science of The Total Environment, Journal Year: 2017, Volume and Issue: 622-623, P. 1509 - 1518

Published: Oct. 19, 2017

Language: Английский

---

Exotic garden plants partly substitute for native plants as resources for pollinators when native plants become seasonally scarce

Oecologia, Journal Year: 2020, Volume and Issue: 194(3), P. 465 - 480

Published: Oct. 20, 2020

Urban green spaces such as gardens often consist of native and exotic plant species, which provide pollen nectar for flower-visiting insects. Although some plants are readily visited by pollinators, it is unknown if at time the season garden may supplement or substitute flower resources provided plants. To investigate seasonal changes in availability from vs. affect visits, diversity particularly plant-pollinator interaction networks, we studied insects over a whole growing 20 urban residential Germany. Over course season, visits to decreased, proportion exotics increased, flower-visitor species richness decreased. Yet, decline was slowed with relatively higher flowering This compensation more positively linked than cover. Plant-pollinator networks were moderately specialized. Interactions complex high summer, but diversity, linkage density, specialisation not influenced species. Thus, later when few flowered, partly substituted without apparent influence on network structure. Late-flowering support pollinator cities. If appropriately managed, risk naturalisation minimized, late-flowering floral pollinators scarce.

Language: Английский

---

Do non‐native plants contribute to insect declines?

Ecological Entomology, Journal Year: 2020, Volume and Issue: 46(4), P. 729 - 742

Published: Nov. 17, 2020

1. With evidence of significant global insect declines mounting, urgent calls to mitigate such are also increasing. Efforts reverse will only succeed, however, if we correctly identify and address their major causes. 2. One potential cause that has received little mention is the spread non‐native plants as invasive species, agroforestry products, ornamental plants. 3. Here (a) review theory predicting most herbivores evolutionarily constrained use a fraction available plant lineages; (b) document extent which nonnative have displaced native communities around globe; (c) examine reduce abundance diversity; (d) suggest guidelines for measuring impact on populations. 4. We conclude host range expansions non‐natives do occur among many but not at frequency required prevent when replace communities. Accordingly, curbing non‐ local, national, international scales be necessary effective way some declines.

Language: Английский

---

Direct interactions between invasive plants and native pollinators: evidence, impacts and approaches

Functional Ecology, Journal Year: 2016, Volume and Issue: 31(1), P. 38 - 46

Published: Aug. 27, 2016

Summary Invasive non‐native plants form interactions with native species and have the potential to cause direct indirect impacts on those species, as well functioning of invaded ecosystems. Many entomophilous invasive resident pollinators; sometimes, these are necessary for reproductive success invader. However, role pollinators play in plant invasion is not understood varies according traits, including breeding system pollination syndrome. The majority studies addressing plant–pollinator mutualisms focussed pollination. Fewer effects flower visitors. Impacts can occur at a range scales: from individual visitors (in terms nutrition, health fitness), populations (size, density growth rates), communities (richness, diversity composition) community‐level (insect–flower interaction networks). Most research date has impacts, almost nothing known about invaders visitor individuals or populations. reward quantity quality, spatial temporal availability accessibility, modulate visitors, thus, different impacts. Similarly, do all respond same way plants. Thus, generalizations difficult make, but understanding population level taxa key explaining There been varied approaches determining most attempting compare vs. non‐invaded habitats. pros cons discussed. Since it impractical study every ecological context which occurs, we recommend better relevant individual‐level traits predict between pollinators. A Lay available this article.

Language: Английский

---

Integrated behavioural and stable isotope data reveal altered diet linked to low breeding success in urban-dwelling blue tits (Cyanistes caeruleus)

Scientific Reports, Journal Year: 2017, Volume and Issue: 7(1)

Published: July 4, 2017

Abstract Animals often show reduced reproductive success in urban compared to adjacent natural areas. The lower availability and quality of food cities is suggested as one key limiting factor. However, only few studies have provided conclusive support by simultaneously assessing availability, diet fitness. We consolidate this evidence taking a holistic approach, comparing blue tits breeding forest, suburban (a) assessed arthropod (b) investigated parental provisioning behaviour, (c) inferred through stable isotope analysis, (d) measured success. At the site, we found significant reduction caterpillar main source tits, consequently fed their offspring with fewer caterpillars than forest birds. Stable analysis confirmed that area was fundamentally different other sites. Reproductive both sites positively associated volume provisioned caterpillars. Our findings provide strong integrative tit nestlings are not receiving suitable diet, may be an important factor for populations potentially many species.

Language: Английский

---

Few keystone plant genera support the majority of Lepidoptera species

Nature Communications, Journal Year: 2020, Volume and Issue: 11(1)

Published: Nov. 13, 2020

Abstract Functional food webs are essential for the successful conservation of ecological communities, and in terrestrial systems, built on a foundation coevolved interactions between plants their consumers. Here, we collate published data host plant ranges associated plant-Lepidoptera from across contiguous United States demonstrate that among ecosystems, distributions plant-herbivore consistently skewed, with small percentage genera supporting majority Lepidoptera. Plant identities critical retaining interaction diversity similar independent geography. Given importance Lepidoptera to ecosystem function, efficient effective restoration degraded landscapes depends inclusion such ‘keystone’ plants.

Language: Английский

---

Patterns and mechanisms of invasive plant impacts on North American birds: a systematic review

Biological Invasions, Journal Year: 2017, Volume and Issue: 19(5), P. 1547 - 1563

Published: Feb. 8, 2017

Language: Английский

---