Publications by authors named "Hanna-Kaisa Lakka"
Article Synopsis
- Chemical eradication of non-native species, like roach and pike, can impact local ecosystems, leading to changes in the abundance and roles of benthic invertebrates in treated lakes.
- The study employed a before-after-control-impact approach to analyze the effects of rotenone treatment on invertebrate communities in six lakes in central Norway, showing a decrease in grazers and collectors, while predator numbers increased post-treatment.
- Despite some shifts in species composition and dietary reliance, overall changes in resource use and trophic diversity among benthic invertebrates were minor, indicating stability in ecosystem functions after fish removal.
When a change in the environment occurs, organisms can maintain an optimal phenotypic state via plastic, reversible changes to their phenotypes. These adjustments, when occurring within a generation, are described as the process of acclimation. While acclimation has been studied for more than half a century, global environmental change has stimulated renewed interest in quantifying variation in the rate and capacity with which this process occurs, particularly among ectothermic organisms.
View Article and Find Full Text PDFBackground: Little is known about variation in catch per unit of effort (CPUE) in stickleback fisheries, or the factors explaining this variation. We investigated how nine-spined stickleback (Pungitius pungitius) CPUE was influenced by trap model by comparing the CPUEs of two very similar minnow trap models fished side-by-side in a paired experimental design.
Results: The galvanized trap type (mean CPUE = 1.