Comparison of Gut Microbiota of Yaks From Different Geographical Regions

Frontiers in Microbiology, Journal Year: 2021, Volume and Issue: 12

Published: June 7, 2021

Gut microbiota are closely linked to host health and adaptability different geographical environments. However, information on the influence of conditions intestinal yaks is limited. In this study, 18 yak fecal samples were collected from three regions China, namely Shangri-la, Lhasa, Yushu, analyzed via high-throughput sequencing. The alpha diversity, as measured by Shannon, ACE, Chao indices, was highest in Shangri-la samples. Principal coordinate analysis detected significant differences composition regions. A total six phyla, 21 families, 29 genera identified dominant phyla Firmicutes Bacteroidetes, most abundant family Ruminococcaceae. addition, Ruminococcaceae_UCG-005 predominant genus more Yushu than other predicted functional gene gut similar. Our results revealed that diversity yaks.

Language: Английский

---

Hyper-Nutrient Enrichment Status in the Sabalan Lake, Iran

Water, Journal Year: 2021, Volume and Issue: 13(20), P. 2874 - 2874

Published: Oct. 14, 2021

Lakes/reservoirs are rapidly deteriorating from cultural eutrophication due to anthropogenic factors. In this study, we aimed (1) explore nutrient levels in the Sabalan dam reservoir (SDR) of northwest Iran, (2) determine water fertility using total phosphorus (TP) based and nitrogen (TN) Carlson trophic state indices, (3) specify primary limiting factors for eutrophication. Our field observations showed a hyper-nutrient enrichment SDR. The highest variation TN column happened when was severely stratified (in August) while TP took place thermocline attenuated with deepening epilimnion October). Both indicators classified SDR as hypereutrophic lake. TN:TP molar ratio averaged at indicated P–deficiency during warm months whilst it suggested co–deficiency P N cold months. Given reservoir, other drivers such residence time (WRT) can also act main contributor We found that WRT varied hundreds thousands days, which much longer than reservoirs/lakes same even greater storage capacity. Therefore, both mainly controlled reservoir. consuming expensive management practices reducing nutrients watershed, changes operation somewhat recover its short-term. However, strategic long-term recovery plans required reduce transition watershed

Language: Английский

---

Effects of seasonal hydrological regulation of cascade dams on the functional diversity of zooplankton: Implications for the management of massive reservoirs and dams

Journal of Hydrology, Journal Year: 2022, Volume and Issue: 610, P. 127825 - 127825

Published: April 13, 2022

Language: Английский

---

Multiple anthropogenic stressors influence the taxonomic and functional homogenization of macroinvertebrate communities on the mainstream of an urban-agricultural river in China

Journal of Environmental Management, Journal Year: 2023, Volume and Issue: 341, P. 118017 - 118017

Published: May 5, 2023

Language: Английский

---

Exploring the community structure of Afrotropical macroinvertebrate traits and ecological preferences along an agricultural pollution gradient in the Kat River, Eastern Cape, South Africa

Ecological Indicators, Journal Year: 2022, Volume and Issue: 135, P. 108570 - 108570

Published: Jan. 18, 2022

Agricultural activities impact riverine ecosystem structure, function, and processes. In the Afrotropical regions, research on agricultural effects macroinvertebrate trait distribution is sparse. this study, we investigated spatial temporal changes in community structure of traits along an disturbance gradient River system. Physicochemical variables were sampled alongside macroinvertebrates at eight sites dry (winter spring) wet (summer autumn) periods 2018–2019. We grouped into four categories using percentage land-use cover within each drainage area. Our results showed that pollution exhibited varying ecological preferences, with such as a predatory lifestyle, medium body-size (>10–20 mm), active swimming, possession spiracles haemoglobin, adult aquatic life stage increasing gradient. These positively associated nutrients (PO4+-P, NO2+-N, NH4+-N NO3+-N), salinity, turbidity temperature deemed tolerant pollution. Shredding, crawling, preference for macrophytes food strong positive associations least disturbed negatively nutrients, water temperature. As such, these three considered sensitive to The identified indicator can be used predict survival patterns organisms under agriculture-induced stress.

Language: Английский

---

Responses of macroinvertebrate functional trait structure to river damming: From within-river to basin-scale patterns

Environmental Research, Journal Year: 2023, Volume and Issue: 220, P. 115255 - 115255

Published: Jan. 9, 2023

Language: Английский

---

The effects of longitudinal fragmentation on riverine beta diversity are modulated by fragmentation intensity

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 903, P. 166703 - 166703

Published: Sept. 6, 2023

The loss of longitudinal connectivity affects river systems globally, being one the leading causes freshwater biodiversity crisis. Barriers alter dispersal aquatic organisms and limit exchange species between local communities, disrupting metacommunity dynamics. However, interplay losses due to dams other drivers structure, such as configuration network, needs be explored. In this paper, we analyzed response fish communities network position fragmentation induced by while controlling for human pressures environmental gradients. We studied three large European catchments covering a gradient: Upper Danube (Austrian section), Ebro (Spain), Odra/Oder (Poland). quantified through reach-scaled indices that account barriers along dendritic capacity organisms. used generalized linear models explain richness Local Contributions Beta Diversity (LCBD) multilinear regressions on distance matrix describe its Replacement Richness Difference components. Results show was not affected fragmentation. Network centrality metrics were relevant beta diversity with lower (Ebro, Odra), strong predictors catchment higher (Danube). conclude in highly fragmented catchments, effects centrality/isolation could masked dam metapopulation dynamics can strongly altered barriers, restoration (i.e. natural gradient) is urgent prevent extinctions.

Language: Английский

---

Spatial and temporal taxonomic and functional beta diversity of macroinvertebrate assemblages along a tropical dammed river

Aquatic Sciences, Journal Year: 2025, Volume and Issue: 87(2)

Published: Jan. 31, 2025

Language: Английский

---

Urbanization leads to convergent succession and homogenization of phytoplankton functional traits in a subtropical watershed over 11 years

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121097 - 121097

Published: Feb. 1, 2025

Language: Английский

---

Longitudinal reconfiguration of multifaceted fish α and β diversity triggered by non-native species invasion in tropic rivers of Hainan Island

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 380, P. 124902 - 124902

Published: March 12, 2025

Language: Английский

---