Global change and ecosystem connectivity: How geese link fields of central Europe to eutrophication of Arctic freshwaters

Hessen, Dag O.; Tombre, Ingunn; Geest, Gerben van; Alfsnes, Kristian

doi:10.1007/s13280-016-0802-9

Cited by 31 publications

(32 citation statements)

References 52 publications

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“…Migratory animals link distant sites (Bauer & Hoye, 2014) and this also applies to the consequences of management actions (Hessen, Tombre, van Geest, & Alfsnes, 2017). Changing conditions on a particular site-be it through management or natural processes-not only alters the behaviour of migrants immediately and locally but could do so also at a later time and at a distance.…”

Section: Discussionmentioning

confidence: 99%

Shooting may aggravate rather than alleviate conflicts between migratory geese and agriculture

Bauer

Lisovski

Eikelenboom‐Kil

et al. 2018

Journal of Applied Ecology

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Many migratory goose populations have thrived over the past decades and their reliance on agricultural resources has often led to conflicts. Control and management measures are sought after but since migratory geese use several sites in their annual cycle, local management actions should consider their potential effects further down the flyway. We used a behaviour‐based migration model to illustrate the consequences of management actions involving hunting, derogation shooting and scaring at single or multiple locations along the flyway, considering various mechanisms of how geese might perceive shooting/hunting. Furthermore, as a proxy for the agricultural damage caused, we calculated the per capita biomass consumption between scenarios—both over time and cumulatively. We found that hunting, shooting and scaring can result in a suite of direct and indirect consequences on migration and foraging behaviour. Most importantly, hunting/shooting on a particular site had implications not only for the behaviour at the actual site but also for behaviour at, and use of, other sites. Furthermore, the specific consequences of shooting/hunting could be counter‐intuitive, that is, aggravate rather than alleviate agricultural damage, depending on where along the migration route changes had taken place and the mechanisms through which hunting/shooting was assumed to affect geese. Synthesis and applications. Management plans are being discussed or implemented for several migratory goose populations and often include shooting, hunting or scaring at one or multiple locations. Using a behaviour‐based model, we assessed the consequences of such local management measures and found that they can indeed lead to a reduction of agricultural conflicts locally but may also aggravate the conflict or shift it to other sites along the flyway. Thus, we recommend the use of these models to scrutinize the efficiency of specific management measures and to assist in identifying an international management regime that minimizes conflicts on a flyway level while still maintaining migratory populations.

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Section: Discussionmentioning

confidence: 99%

Shooting may aggravate rather than alleviate conflicts between migratory geese and agriculture

Bauer

Lisovski

Eikelenboom‐Kil

et al. 2018

Journal of Applied Ecology

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“…; Hessen et al . ). Of all the taxonomic groups that display migratory behaviour, birds have received the greatest attention (Newton ).…”

Section: Introductionmentioning

confidence: 97%

“…Migratory behaviour varies among species based on mode, speed, duration, body mass and scale-all of which are dictated by the physical and natural environment in which it occurs. In turn, migration affects the structure and function of the ecosystems that these species occupy across the annual cycle (Fridley 2001;Bauer & Hoye 2014;Chapman et al 2015b;Hessen et al 2017). Of all the taxonomic groups that display migratory behaviour, birds have received the greatest attention (Newton 2008).…”

Section: Introductionmentioning

confidence: 99%

Navigating north: how body mass and winds shape avian flight behaviours across a North American migratory flyway

et al. 2018

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The migratory patterns of birds have been the focus of ecologists for millennia. What behavioural traits underlie these remarkably consistent movements? Addressing this question is central to advancing our understanding of migratory flight strategies and requires the integration of information across levels of biological organisation, e.g. species to communities. Here, we combine species-specific observations from the eBird citizen-science database with observations aggregated from weather surveillance radars during spring migration in central North America. Our results confirm a core prediction of migration theory at an unprecedented national scale: body mass predicts variation in flight strategies across latitudes, with larger-bodied species flying faster and compensating more for wind drift. We also find evidence that migrants travelling northward earlier in the spring increasingly compensate for wind drift at higher latitudes. This integration of information across biological scales provides new insight into patterns and determinants of broad-scale flight strategies of migratory birds.

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“…Arctic amplification, Arctic geese, barnacle goose, carryover effects, climate change, migration, population dynamics, trophic interactions Arctic nesting geese play a key trophic role both as herbivores (Bazely & Jefferies, 1989;Fujita & Kameda, 2016) and prey (Bêty, Gauthier, Korpimäki, & Giroux, 2002), providing nutrient transfer within and between temperate and Arctic ecosystems (Hahn, Loonen, & Klaassen, 2011;Hessen, Tombre, van Geest, & Alfsnes, 2017). Substantial differences in local population trends of geese at their Arctic breeding grounds have been reported (Jensen et al, 2008;Lameris et al, 2018;Morrissette et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Contrasting consequences of climate change for migratory geese: Predation, density dependence and carryover effects offset benefits of high‐arctic warming

Layton‐Matthews

Hansen

Grøtan

et al. 2019

Global Change Biology

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Climate change is most rapid in the Arctic, posing both benefits and challenges for migratory herbivores. However, population‐dynamic responses to climate change are generally difficult to predict, due to concurrent changes in other trophic levels. Migratory species are also exposed to contrasting climate trends and density regimes over the annual cycle. Thus, determining how climate change impacts their population dynamics requires an understanding of how weather directly or indirectly (through trophic interactions and carryover effects) affects reproduction and survival across migratory stages, while accounting for density dependence. Here, we analyse the overall implications of climate change for a local non‐hunted population of high‐arctic Svalbard barnacle geese, Branta leucopsis, using 28 years of individual‐based data. By identifying the main drivers of reproductive stages (egg production, hatching and fledging) and age‐specific survival rates, we quantify their impact on population growth. Recent climate change in Svalbard enhanced egg production and hatching success through positive effects of advanced spring onset (snow melt) and warmer summers (i.e. earlier vegetation green‐up) respectively. Contrastingly, there was a strong temporal decline in fledging probability due to increased local abundance of the Arctic fox, the main predator. While weather during the non‐breeding season influenced geese through a positive effect of temperature (UK wintering grounds) on adult survival and a positive carryover effect of rainfall (spring stopover site in Norway) on egg production, these covariates showed no temporal trends. However, density‐dependent effects occurred throughout the annual cycle, and the steadily increasing total flyway population size caused negative trends in overwinter survival and carryover effects on egg production. The combination of density‐dependent processes and direct and indirect climate change effects across life history stages appeared to stabilize local population size. Our study emphasizes the need for holistic approaches when studying population‐dynamic responses to global change in migratory species.

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Global change and ecosystem connectivity: How geese link fields of central Europe to eutrophication of Arctic freshwaters

Cited by 31 publications

References 52 publications

Shooting may aggravate rather than alleviate conflicts between migratory geese and agriculture

Shooting may aggravate rather than alleviate conflicts between migratory geese and agriculture

Navigating north: how body mass and winds shape avian flight behaviours across a North American migratory flyway

Contrasting consequences of climate change for migratory geese: Predation, density dependence and carryover effects offset benefits of high‐arctic warming

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