Relationships between Bird Assemblages and Habitat Variables in a Boreal Forest of the Khentii Mountain, Northern Mongolia

Purevdorj, Zoljargal; Munkhbayar, Munkhbaatar; Paek, Woon Kee; Ganbold, Onolragchaa; Jargalsaikhan, Ariunbold; Purevee, Erdenetushig; Amartuvshin, Tuvshinlkhagva; Genenjamba, Uranchimeg; Nyam, Batbayar; Lee, Joon Woo

doi:10.3390/f13071037

Cited by 3 publications

(3 citation statements)

References 34 publications

(39 reference statements)

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“…As already mentioned, forests harbor a wide variety of wildlife species, including mammals, birds, arthropods, and others. The strong relationship between bird communities and forest habitat types is demonstrated in the study by Purevdorj et al [32] in northern Mongolia. The study points out the need for maintaining diverse forest habitats and restoring forests that have been lost or degraded by anthropogenic activities.…”

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confidence: 73%

Biodiversity and Conservation of Forests

Xofis,

Kefalas,

Poirazidis

2023

Forests

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confidence: 73%

Biodiversity and Conservation of Forests

Xofis,

Kefalas,

Poirazidis

2023

Forests

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“…A linear model, redundancy analysis (RDA), was selected rather than a unimodal method (e.g., Canonical Correspondence Analysis-CCA) because the dominant gradient length was less than 3 [70,72]. Redundancy analysis (RDA) was performed as a direct gradient method to define the amount of variation in alien fish communities that could be described by environmental parameters [73,74]. Based on the "forward selection method" and ordiR2step function, the most important variables were selected based on significance and adjusted squared R. Of the ten alien fish species collected, only five species (with a frequency of occurrence higher than 5% [72]) and 12 environmental variables were selected (after a forward stepwise selection) for inclusion in the RDA.…”

Section: Discussionmentioning

confidence: 99%

Distribution and Expansion of Alien Fish Species in the Karun River Basin, Iran

Shahraki,

Keivany,

Dorche

et al. 2023

Fishes

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We assessed the distribution of alien fishes in the Karun River Basin, Iran. Fish were collected from 39 sites during the November–December 2018 low-flow period. In total, 39 fish species from nine orders and 14 families were documented. Among these, 10 species were alien to the basin (986 individuals; 15.7%). Four species were the most abundant alien species and primarily in impounded, downstream reaches. Redundancy analysis (RDA) was conducted to identify the extent of changes in alien fish assemblages with environmental parameters. RDA1 and RDA2 accounted for 36.24% and 25.33% of the variation of alien species, respectively. Altitude, depth, electrical conductivity, water temperature, turbidity, dissolved oxygen, and river width were the most significant parameters affecting alien species distributions. We present a dual-pathway cause-and-effect hypothesis proposing that alien fish species presence causes declines in the ecological status of native fish communities. We then explore how human-induced aquatic ecosystem degradation creates opportunities for alien species to invade new ecosystems, further impacting native fish communities. Our study contributes insight into the cause and effect of the presence of alien fish species in the Karun River Basin and emphasizes the urgency of conservation measures to protect this critically endangered watershed.

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“…communities could be described by environmental parameters(Huang et al 2019;Purevdorj et al 2022;Zare Shahraki et al 2022b). Based on the "forward selection method" and ordiR2step function, the most important variables were selected based on signi cance and adjusted squared R. Of the ten alien species collected, ve species (with frequency of occurrence higher than 5%) and 12 environmental variables (Zare Shahraki et al 2022b) (average value of three replicates) were selected (after a forward stepwise selection) for inclusion in the RDA.…”

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confidence: 99%

Distribution and ecological status of alien fish species in the Karun River Basin, Iran

Shahraki

Keivany

Dorche

et al. 2022

Preprint

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We assessed the distribution of alien fishes in one of the most ecologically and economically important aquatic ecosystems in Iran, the Karun River Basin. Fish samples were collected from 35 sites in the Karun River Basin during the low-flow period from November to December 2018. We documented the occurrence of 37 species of fishes from nine orders and 14 families. Amongst these, 10 species were alien (986 individuals; 15.7%). The relative abundance of native, endemic, and alien species estimated as 54.8%, 29.5% and 15.7%, respectively. Total length of alien species ranged from 0.4 to 25.5 cm and their total weight from 0.17 to 350 g. The ten alien species belonged to seven families including, Cyprinidae, Cichlidae, Xenocyprididae, Gobiidae, Poeciliidae, Gobionidae, and Salmonidae. Carassius gibelio, Oreochromis aureus, and Coptodon zillii were found to be the most abundant alien species in the downstream region. We applied redundancy analysis (RDA) as a direct stressor method to identify the extent of changes in alien fish assemblages with environmental parameters. The first two axes (RDA1 and RDA2) accounted for 36.24% and 25.33% of the variation of five alien species, respectively. Altitude, depth, electrical conductivity, water temperature, turbidity, dissolved oxygen, and river width were the most significant parameters affecting the distribution of alien species. Our results propose that management practices are needed in the downstream sections of the Basin to recover native and endemic species. Monitoring of presence and extent of alien species is a key to measuring the success of these efforts.

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Relationships between Bird Assemblages and Habitat Variables in a Boreal Forest of the Khentii Mountain, Northern Mongolia

Cited by 3 publications

References 34 publications

Biodiversity and Conservation of Forests

Biodiversity and Conservation of Forests

Distribution and Expansion of Alien Fish Species in the Karun River Basin, Iran

Distribution and ecological status of alien fish species in the Karun River Basin, Iran

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