Related Experiment Video
Updated: May 30, 2026
06:37
Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds
Published on: November 13, 2017
Landscape-stream interactions and habitat conservation for amphibians
Gentile Francesco Ficetola1, Laura Marziali, Bruno Rossaro
1Dipartimento di Scienze dell'Ambiente e del Territorio, Università degli Studi di Milano Bicocca, Piazza della Scienza 1, 20126 Milano, Italy. francesco.ficetola@unimib.it
Summary
Landscape features significantly impact amphibian communities in streams, affecting both individual species and overall community structure. Protecting natural landscapes is crucial for maintaining water quality and supporting amphibian populations.
Area of Science:
- Ecology
- Conservation Biology
- Freshwater Ecology
Background:
- Semiaquatic organisms rely on both terrestrial and aquatic environments, but the combined effects on communities are understudied.
- Understanding landscape-aquatic system interactions is key for effective conservation management.
Purpose of the Study:
- To investigate how landscape features indirectly influence amphibian distribution and community structure through freshwater ecosystems.
- To quantify the interplay between landscape, water quality, and amphibian populations.
Main Methods:
- Surveyed 74 streams in northern Italy, collecting data on amphibians, water, microhabitat, and surrounding landscape features.
- Employed information-theoretic approaches, structural equation models, and constrained redundancy analyses to assess causal relationships.
Main Results:
- Amphibian distribution, specifically for Salamandra salamandra, was linked to landscape type, hydrology, and water quality (e.g., lower phosphates in natural landscapes).
- Landscape characteristics directly and indirectly (via water quality) influenced salamander presence.
- Community structure was significantly shaped by both landscape and water characteristics.
Conclusions:
- Upland environments critically influence amphibians by affecting water quality in aquatic habitats.
- Landscape management strategies can enhance wetland features and mitigate negative impacts on amphibian communities.
- Synergistic effects of landscape alteration can amplify threats to amphibians.
Related Concept Videos
01:24Freshwater Microbial Ecology
Freshwater systems such as streams, rivers, and lakes exhibit distinct physical and biological characteristics that influence their microbial communities. These environments are broadly categorized into lotic systems—those with flowing waters like streams and most rivers—and lentic systems, which include still or slow-moving waters such as lakes, ponds, and marshes.In lentic systems, phytoplankton drive primary production, generating autochthonous organic carbon. In contrast, lotic systems...
02:29Hybrid Zones
Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
01:17What is an Ecosystem?
Overview
01:30Microbial Wastewater Treatment
Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
02:31Habitat Fragmentation
Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
02:07Conservation of Declining Populations
Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.