Journal ArticleDOI
The Cold-Water Connection: Bergmann’s Rule in North American Freshwater Fishes
Reads0
Chats0
TLDR
This study contradicts previous research suggesting Bergmann’s rule does not apply to freshwater fishes, and is congruent with an emerging paradigm of variable macroecological body size patterns in poikilotherms.Abstract:
Understanding general rules governing macroecological body size variations is one of the oldest pursuits in ecology. However, this science has been dominated by studies of terrestrial vertebrates, spurring debate over the validity of such rules in other taxonomic groups. Here, relationships between maximum body size and latitude, temperature, and elevation were evaluated for 29 North American freshwater fish species. Bergmann’s rule (i.e., that body size correlates positively with latitude and negatively with temperature) was observed in 38% of species, converse Bergmann’s rule (that body size correlates negatively with latitude and positively with temperature) was observed in 34% of species, and 28% of species showed no macroecological body size relationships. Most notably, every species that expressed Bergmann’s rule was a cool- or cold-water species while every species that expressed converse Bergmann’s rule was a warm-water species, highlighting how these patterns are likely connected to speci...read more
Citations
More filters
Journal ArticleDOI
Shrinking body sizes in response to warming: explanations for the temperature-size rule with special emphasis on the role of oxygen.
Wilco C. E. P. Verberk,David Atkinson,K. Natan Hoefnagel,K. Natan Hoefnagel,Andrew G. Hirst,Andrew G. Hirst,Curtis R. Horne,Henk Siepel +7 more
TL;DR: Temperature–size responses can be explained by the ‘Ghost of Oxygen‐limitation Past’, whereby the resulting (evolved) T–S responses safeguard sufficient oxygen provisioning under warmer conditions, reflecting the balance between oxygen supply and demands experienced by ancestors.
Journal ArticleDOI
The future distribution of river fish: The complex interplay of climate and land use changes, species dispersal and movement barriers.
TL;DR: Smaller-bodied fish seem most vulnerable and least able to track future environmental change as their habitat shifted most and they are typically weaker dispersers, while smaller-bodied species are rather restricted by their specific dispersal ability.
Journal ArticleDOI
Fish die-offs are concurrent with thermal extremes in north temperate lakes
TL;DR: In this paper, a large-scale study of fish die-off rarity and unpredictability was conducted to quantify the relationship between mass die-offs and local environmental temperatures, which revealed a direct link between novel temperature regimes and the increased probability of catastrophic ecological events in freshwater ecosystems.
Journal ArticleDOI
Seventy-Year Retrospective on Size-Structure Changes in the Recreational Fisheries of Wisconsin
TL;DR: To identify past successes and future opportunities for improved fisheries management in Wisconsin, size-structure information on 19 gamefish species from 1944 to 2012 is synthesized, incorporating data on more than 2 million measured individuals.
Journal ArticleDOI
Deforestation and stream warming affect body size of Amazonian fishes
TL;DR: A broad scale reduction in fish body size due to warming may be occurring in streams throughout the Amazonian Arc of Deforestation, with potential implications for the conservation of Amazonian fish biodiversity and food supply for people around the Basin.
References
More filters
Journal ArticleDOI
Human Domination of Earth's Ecosystems
TL;DR: Human alteration of Earth is substantial and growing as discussed by the authors, between one-third and one-half of the land surface has been transformed by human action; the carbon dioxide concentration in the atmosphere has increased by nearly 30 percent since the beginning of the Industrial Revolution; more atmospheric nitrogen is fixed by humanity than by all natural terrestrial sources combined; more than half of all accessible surface fresh water is put to use by humanity; and about one-quarter of the bird species on Earth have been driven to extinction.
Journal ArticleDOI
Freshwater biodiversity: importance, threats, status and conservation challenges
David Dudgeon,Angela Arthington,Mark O. Gessner,Zen'ichiro Kawabata,Duncan Knowler,Christian Lévêque,Robert J. Naiman,Anne-Hélène Prieur-Richard,Doris Soto,Melanie L. J. Stiassny,Caroline A Sullivan +10 more
TL;DR: This article explores the special features of freshwater habitats and the biodiversity they support that makes them especially vulnerable to human activities and advocates continuing attempts to check species loss but urges adoption of a compromise position of management for biodiversity conservation, ecosystem functioning and resilience, and human livelihoods.
Journal ArticleDOI
Predation, Body Size, and Composition of Plankton
TL;DR: The effect of a marine planktivore on lake plankton illustrates theory of size, competition, and predation.
Journal ArticleDOI
Accuracy, precision and quality control in age determination, including a review of the use and abuse of age validation methods
TL;DR: This review highlights the best available methods for insuring ageing accuracy and quantifying ageing precision, whether in support of large-scale production ageing or a small-scale research project.
Journal ArticleDOI
Body size, metabolic rate, generation time, and the molecular clock.
TL;DR: Reconsideration of the generation time hypothesis to include physiological effects such as metabolic rate improves the theoretical underpinnings of molecular evolution.