Rice Fields and Aquatic Insect Biodiversity in Italy: State of Knowledge and Perspectives in the Context of Global Change

Water, Год журнала: 2025, Номер 17(6), С. 845 - 845

Опубликована: Март 15, 2025

Rice fields are one of the most important and extensive agro-ecosystems in world. Italy is a major non-Asian rice producer, with significant proportion its yield originating from vast area within Po Valley, region nourished by waters Alps. While biodiversity these has been extensively documented for certain faunal groups, such as birds, there remains paucity research on aquatic insects. A further challenge limited dissemination findings, which have primarily published “gray” literature (local journals, newsletters similar). Moreover, particular significance field invasion biology, given their role arrival spread alien species. efficacy substitute now-disappeared lowland natural environments well documented, it equally evident that traditional rice-growing techniques can require an unsustainable use water resources, threatens surrounding lotic systems. Here, we summarize review multiple sources entomological information Italian fields, analyzing both publications ISI journals papers local (gray literature). In near future, strategies reduce demand irrigation, promote cultivation drought-tolerant crops, utilize precision farming will be implemented. The balancing need to withdrawal rivers maintenance wetlands where possible support this pivotal component regional biodiversity.

Язык: Английский

Complex selection processes on invasive crayfish phenotype at the invasion front of the Zambezi floodplains ecoregion

Freshwater Biology, Год журнала: 2024, Номер 69(9), С. 1322 - 1337

Опубликована: Июль 12, 2024

Abstract Understanding the eco‐evolutionary processes which drive phenotypic variability in non‐native species is crucial to predicting impact and informing spatially explicit management models. Invasive redclaw crayfish, Cherax quadricarinatus , are spreading rapidly through ecologically economically important Upper Middle Zambezi system south‐central Africa. We tested whether there was an invasion front effect Barotse floodplain disentangle these effects were related environmental filtering, spatial sorting, or density‐dependent along a nonlinear 200 km gradient over seasonal hydrological periods. Crayfish spread up‐ down‐stream indicated expanding population compared former 2019, facilitated by both sexes. Wet season detection probability relative abundance lower than dry season. No signals of filtering detected as result high connectivity habitats wet The characterised abundance, body condition, larger overall chelae size, longer leg length. There no on sex ratio. This that predation pressure acting selective forces across gradient. Better understanding flood regime trophic interactions dispersal urgently needed. Population suppression reduce sorting conspecific competition could be viable option at front.

Язык: Английский

River hydrology mediates fish invasions in Addo Elephant National Park, South Africa

Koedoe, Год журнала: 2024, Номер 66(1)

Опубликована: Май 20, 2024

Invasive freshwater fish can often have severe negative effects on native fishes in river systems. The interactions between hydrology and habitat variability mediate the speed success of individual invasions consequent impact biodiversity. rivers within Addo Elephant National Park (AENP) Eastern Cape, South Africa experience cyclical droughts wet periods as a result are naturally episodic. These were recently invaded by three non-native species, invasive largemouth bass ( Micropterus salmoides ) well extralimital sharptooth catfish Clarias gariepinus Mozambique tilapia Oreochromis mossambicus ). Monitoring key sampling sites along two over 12-year period that included major revealed unexpected patterns spread these species their with fishes. On Coerney River, C. repeatedly was extirpated from seasonal reach river, wherein O. only occasionally captured. Wit apparently independent introductions M. lower upper reaches resulted patchy occupancy course 12 years. While regularly co-occurred appeared to locally extirpate endangered Cape redfin Pseudobarbus afer During drought, both persisted close but disconnected pools, suggesting episodic geomorphology may offer temporary predation refugia for during drought. Conservation implications: Drought mitigate against protected areas. Effects drying invasion corridors spatial should be taken into consideration when managing such invasions. Severe also an opportunity actively control they confined accessible drought area.

Язык: Английский