Salmon carcasses influence genetic linkages between forests and streams

LeRoy, Carri J.; Fischer, Dylan G.; Andrews, Walton M.; Belleveau, Lisa; Barlow, Clyde H.; Schweitzer, Jennifer A.; Bailey, Joseph K.; Marks, Jane C.; Kallestad, Jeff C.

doi:10.1139/cjfas-2015-0439

Cited by 7 publications

(4 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example salmon carcasses can influence the genotypic effects of riparian tree species on ecosystem parameters (LeRoy et al . ). There is also evidence that selection on salmon migrating to their spawning grounds can alter nutrient dynamics; selection against larger sized Pacific salmon due to stranding and bear predation leads to changes in their size distribution and a subsequent decrease and increase, respectively, in the flux of nutrients into the spawning grounds (Carlson et al .…”

Section: Discussionmentioning

confidence: 97%

Nutrients from salmon parents alter selection pressures on their offspring

et al. 2017

View full text Add to dashboard Cite

Organisms can modify their surrounding environment, but whether these changes are large enough to feed back and alter their evolutionary trajectories is not well understood, particularly in wild populations. Here we show that nutrient pulses from decomposing Atlantic salmon (Salmo salar) parents alter selection pressures on their offspring with important consequences for their phenotypic and genetic diversity. We found a strong survival advantage to larger eggs and faster juvenile metabolic rates in streams lacking carcasses but not in streams containing this parental nutrient input. Differences in selection intensities led to significant phenotypic divergence in these two traits among stream types. Stronger selection in streams with low parental nutrient input also decreased the number of surviving families compared to streams with high parental nutrient levels. Observed effects of parent‐derived nutrients on selection pressures provide experimental evidence for key components of eco‐evolutionary feedbacks in wild populations.

show abstract

Section: Discussionmentioning

confidence: 97%

Nutrients from salmon parents alter selection pressures on their offspring

et al. 2017

View full text Add to dashboard Cite

show abstract

“…, LeRoy et al. ) for inland ecosystems as sources of marine‐derived nutrients (Naiman et al. , Helfield and Naiman ).…”

Section: Introductionmentioning

confidence: 99%

“…are iconic in terms of their cultural, economic, and ecological significance. They are central to the identity and traditional practices of indigenous peoples, vital for recreational and commercial fisheries, and keystone species (Willson and Halupka 1995, Kaeriyama et al 2012, LeRoy et al 2015 for inland ecosystems as sources of marine-derived nutrients (Naiman et al 2002, Helfield andNaiman 2006). Coho salmon (O. kisutch) in particular are a prominent sentinel species for the urban stream syndrome ) and the impetus for emerging green infrastructure methods for filtering pollutants to improve water quality in salmon spawning and rearing habitats , Spromberg et al 2016.…”

Section: Introductionmentioning

confidence: 99%

Roads to ruin: conservation threats to a sentinel species across an urban gradient

Feist

Buhle

Baldwin

et al. 2017

Ecological Applications

View full text Add to dashboard Cite

Urbanization poses a global challenge to species conservation. This is primarily understood in terms of physical habitat loss, as agricultural and forested lands are replaced with urban infrastructure. However, aquatic habitats are also chemically degraded by urban development, often in the form of toxic stormwater runoff. Here we assess threats of urbanization to coho salmon throughout developed areas of the Puget Sound Basin in Washington, USA. Puget Sound coho are a sentinel species for freshwater communities and also a species of concern under the U.S. Endangered Species Act. Previous studies have demonstrated that stormwater runoff is unusually lethal to adult coho that return to spawn each year in urban watersheds. To further explore the relationship between land use and recurrent coho die‐offs, we measured mortality rates in field surveys of 51 spawning sites across an urban gradient. We then used spatial analyses to measure landscape attributes (land use and land cover, human population density, roadways, traffic intensity, etc.) and climatic variables (annual summer and fall precipitation) associated with each site. Structural equation modeling revealed a latent urbanization gradient that was associated with road density and traffic intensity, among other variables, and positively related to coho mortality. Across years within sites, mortality increased with summer and fall precipitation, but the effect of rainfall was strongest in the least developed areas and was essentially neutral in the most urbanized streams. We used the best‐supported structural equation model to generate a predictive mortality risk map for the entire Puget Sound Basin. This map indicates an ongoing and widespread loss of spawners across much of the Puget Sound population segment, particularly within the major regional north‐south corridor for transportation and development. Our findings identify current and future urbanization‐related threats to wild coho, and show where green infrastructure and similar clean water strategies could prove most useful for promoting species conservation and recovery.

show abstract

“…Most studies of the functional effects of imperilled fishes focused on salmonids (Benjamin, Bellmore, & Watson, 2016;Claeson, Li, Compton, & Bisson, 2006;LeRoy et al, 2016;Marcarelli, Baxter, & Wipfli, 2014;Samways & Cunjak, 2015), with this family being significantly overrepresented relative to their total number of species in North America (Figure 2). This focus is likely in part because the migratory patterns of salmonids from marine to freshwater ecosystems make them an ideal study system to investigate resource flows between environments using before-after comparisons (Levi et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

Taxonomic and geographic gaps in understanding the functional effects of imperilled fishes on freshwater ecosystems

et al. 2019

View full text Add to dashboard Cite

The effects that fishes have on rates of one or more ecosystem processes (hereafter referred to as functional effects) are often invoked as an important reason for imperilled species conservation. However, the degree to which we understand these effects is rarely evaluated for most groups of fishes. We assessed how well the functional effects of freshwater and diadromous fishes, one of the most imperilled groups of animals, are quantified to date. We found that 88% of studies considering the functional effects of imperilled North American fishes were conducted on one family, Salmonidae. Studies of the functional effects of fishes were also concentrated in Pacific drainages of North America, with few studies in hotspots of imperilled fish diversity such as the Southeastern United States, the arid Southwest and central Mexico. Our results demonstrate the vast taxonomic and geographic gaps in our functional understanding of imperilled fishes and highlight the need to broaden this work to justify the argument that they are functionally important in the ecosystems they inhabit.

show abstract

Salmon carcasses influence genetic linkages between forests and streams

Cited by 7 publications

References 50 publications

Nutrients from salmon parents alter selection pressures on their offspring

Nutrients from salmon parents alter selection pressures on their offspring

Roads to ruin: conservation threats to a sentinel species across an urban gradient

Taxonomic and geographic gaps in understanding the functional effects of imperilled fishes on freshwater ecosystems

Contact Info

Product

Resources

About