S. Hartz results 22
· Newest (Page 1/1, per page 25)
Author: S. Hartz ×Clear All Filters
Search Results
Assessing phototaxis behavior in non-resistant and insecticide-resistant populations of Hyalella aztecaNARA Subscribed
Pyrethroid insecticides are ubiquitous in waterways throughout the United States. Consequently, species have evolved resistance to these insecticides via receptor site mutations with unknown impacts to their fitness. The goal of this study was to determine if pyrethroid-resistant Hyalella azteca populations (Escondido and Mosher) exhibited disrupted phototaxis compared to a non-resistant population. We tested phototactic respo...
NEOTROPICAL FRESHWATER FISHES : A dataset of occurrence and abundance of freshwater fishes in the NeotropicsNARA Subscribed
The Neotropical region hosts 4225 freshwater fish species, ranking first among the world's most diverse regions for freshwater fishes. Our NEOTROPICAL FRESHWATER FISHES data set is the first to produce a large‐scale Neotropical freshwater fish inventory, covering the entire Neotropical region from Mexico and the Caribbean in the north to the southern limits in Argentina, Paraguay, Chile, and Uruguay. We compiled 185,787 distri...
Mammalian carnivores are considered a key group in maintaining ecological health and can indicate potential ecological integrity in landscapes where they occur. Carnivores also hold high conservation value and their habitat requirements can guide management and conservation plans. The order Carnivora has 84 species from 8 families in the Neotropical region: Canidae; Felidae; Mephitidae; Mustelidae; Otariidae; Phocidae; Procyon...
NEOTROPICAL ALIEN MAMMALS: a data set of occurrence and abundance of alien mammals in the NeotropicsNARA Subscribed
Biological invasion is one of the main threats to native biodiversity. For a species to become invasive, it must be voluntarily or involuntarily introduced by humans into a nonnative habitat. Mammals were among first taxa to be introduced worldwide for game, meat, and labor, yet the number of species introduced in the Neotropics remains unknown. In this data set, we make available occurrence and abundance data on mammal specie...
Geographical patterns of body mass distribution are robust even when inserting uncertainty in average estimates of species body massNARA Subscribed
Pardiñas, Valenzuela, and Salazar‐Bravo (2017) are concerned that eventual differences in species mean body masses and in the phylogenetic hypothesis used in Maestri et al. (2016)—compared with those available on other potential sources—could affect the results of our original article. Here, we used a new phylogenetic hypothesis to conduct the same analyses of the original article, and we randomly sampled 1000 values of body m...
The relationships between fish composition, connectivity and morphometry of 103 lagoons in nine freshwater ecoregions ( FEOW ) between 2·83° S and 37·64° S were evaluated in order to detect possible congruence between the gradient of species richness and similarities of assemblage composition. Most lagoons included in the study were 2 , with a maximum of 3975 km 2 in surface area. Combined surface area of all lagoons included...
Geographical variation of body size in sigmodontine rodents depends on both environment and phylogenetic composition of communitiesNARA Subscribed
Aim Body size variation in animal assemblages is a widely addressed pattern in biogeographical studies, and is affected by both environmental gradients and phylogenetic constraints. However, no study has yet explored to what extent the association between body size variation and environmental gradients across broad spatial scales is influenced by the biogeographical distribution of different phylogenetic lineages. In this stud...
Phenological responses in maple to experimental atmospheric warming and CO 2 enrichmentNARA Subscribed
Evidence that global warming has altered the phenology of the biosphere, possibly contributing to increased plant production in the northern hemisphere, has come from a diversity of observations at scales ranging from the view of the back yard to satellite images of the earth. These observations, coupled with an understanding of the effects of temperature on plant phenology, suggest that future changes in the atmosphere and cl...
Previous1Next