An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
steppes, etc ; biomass; ducks; ecosystems; environment; herbivores; invertebrates; omnivores; piscivores; shorelines; water birds; Kazakhstan; Show all 12 Subjects
Abstract:
... Inland saline waters in Central Asia constitute an important part of steppe ecosystems, providing considerable ecological functions and ecosystem services. Here we aim to present a multi-spatial scale analysis of nutrient cycling and transport waterbird guilds, and the environmental attributes of saline-soda aquatic ecosystems in Kazakhstan. The density, biomass, and diversity of waterbird guilds ...
... From micro to planetary scales, spatial heterogeneity—patchiness—is ubiquitous in ecosystems, defining the environments in which organisms move and interact. However, most large‐scale models still use spatially averaged ‘mean fields’ to represent natural populations, while fine‐scale spatially explicit models are mostly restricted to particular organisms or systems. In a conceptual paper, Grünbaum ...
Guido Alberto Gnecchi-Ruscone; Anna Szécsényi-Nagy; István Koncz; Gergely Csiky; Zsófia Rácz; A.B. Rohrlach; Guido Brandt; Nadin Rohland; Veronika Csáky; Olivia Cheronet; Bea Szeifert; Tibor Ákos Rácz; András Benedek; Zsolt Bernert; Norbert Berta; Szabolcs Czifra; János Dani; Zoltán Farkas; Tamara Hága; Tamás Hajdu; Mónika Jászberényi; Viktória Kisjuhász; Barbara Kolozsi; Péter Major; Antónia Marcsik; Bernadett Ny. Kovacsóczy; Csilla Balogh; Gabriella M. Lezsák; János Gábor Ódor; Márta Szelekovszky; Tamás Szeniczey; Judit Tárnoki; Zoltán Tóth; Eszter K. Tutkovics; Balázs G. Mende; Patrick Geary; Walter Pohl; Tivadar Vida; Ron Pinhasi; David Reich; Zuzana Hofmanová; Choongwon Jeong; Johannes Krause
steppes, etc ; ancestry; basins; genetic variation; genome; Show all 5 Subjects
Abstract:
... The Avars settled the Carpathian Basin in 567/68 CE, establishing an empire lasting over 200 years. Who they were and where they came from is highly debated. Contemporaries have disagreed about whether they were, as they claimed, the direct successors of the Mongolian Steppe Rouran empire that was destroyed by the Turks in ∼550 CE. Here, we analyze new genome-wide data from 66 pre-Avar and Avar-pe ...
steppes, etc ; Artemisia; ecological resilience; grasses; rangelands; Show all 5 Subjects
Abstract:
... •A workshop focusing on invasive annual grass management in sagebrush steppe was held on December 14 and 15, 2020•The workshop was attended by 250 participants with over 30 presenters.•This special issue of Rangelands includes papers authored by the presenters on the topics covered in the workshop. ...
steppes, etc ; bioeconomic models; compliance; ecosystems; risk; China; Show all 6 Subjects
Abstract:
... Addressing serious grassland degradation without exacerbating already low herder incomes is a major challenge for the Chinese government. In response, the Grassland Ecosystem Subsidy and Award Scheme (GESAS) was introduced in 2011 where herders receive payments if they comply with specified stocking rates set at more sustainable levels. However, compliance with GESAS, as well as low herder incomes ...
steppes, etc ; glucose; grassland soils; labile carbon; temperature; Show all 5 Subjects
Abstract:
... It remains unclear how soil microbes respond to labile organic carbon (LOC) inputs and how temperature sensitivity (Q₁₀) of soil organic matter (SOM) decomposition is affected by LOC inputs in a short-term. In this study, ¹³C-labeled glucose was added to a pristine grassland soil at four temperatures (10, 15, 20, and 25 °C), and the immediate utilization of LOC and native SOM by microbes was measu ...
steppes, etc ; ecoregions; ecosystems; meadows; phenology; spring; temperature; China; Show all 8 Subjects
Abstract:
... Temperature and precipitation are the primary regulators of vegetation phenology in temperate zones. However, the relative contributions of each factor and their underlying combined effect on vegetation phenology are much less clear, especially for the grassland of the Tibetan Plateau To quantify the contribution of each factor and the potential interactions, we conducted redundancy analysis for g ...
steppes, etc ; climate; highlands; meadows; prediction; spring; temperature; winter; China; Show all 9 Subjects
Abstract:
... Temperature and precipitation are considered to be the most important indicators affecting the green-up date. Sensitivity of the green-up date to temperature and precipitation is considered to be one of the key indicators to characterize the response of terrestrial ecosystems to climate change. We selected the main grassland types for analysis, including temperate steppe, temperate meadow steppe, ...
steppes, etc ; Pleistocene epoch; archaeology; photogrammetry; Eastern European region; Ukraine; Show all 6 Subjects
Abstract:
... The complex of Kamyana Mohyla is the westernmost rock art location of the Eurasian Steppe and the largest accumulation of cave art sites in the Eastern Europe. So far it has been believed that the complex contains the Upper Paleolithic cave art images as well as portable art collection that resemble the instances of Upper Paleolithic worldview. Though this belief lacked the support of archaeologic ...
steppes, etc ; chamaephytes; loess; surveys; vascular plants; woody plants; Hungary; Show all 7 Subjects
Abstract:
... This article evaluates the three-year vegetation dynamics of a species rich, protected steppe grassland on loess where no grazing occurred for decades at Bicske, Central Hungary. A detailed coenological survey of vascular vegetation was conducted in four permanent plots of 16 m² each from 2018 to 2020. Raunkiaer’s life-forms, distribution range, and thousand-seed weight of species were evaluated. ...
steppes, etc ; arid lands; catenas; ecosystems; homeostasis; microbial biomass; nitrogen; stoichiometry; Show all 8 Subjects
Abstract:
... The impacts of increased ecosystem nitrogen (N) inputs on soil microbial biomass C:N:P stoichiometry have been extensively explored. However, the stoichiometric homeostasis and driving mechanisms of microbial C:N:P stoichiometry following N enrichment remain elusive in dryland ecosystems, especially in moderately alkaline desert steppes. Here, we employed a five-year (2015–2019) N enrichment exper ...
steppes, etc ; biodiversity; carbon; nitrogen; photolysis; plant litter; soil bacteria; ultraviolet radiation; Show all 8 Subjects
Abstract:
... Atmospheric nitrogen (N) deposition has altered biogeochemical cycles and ecosystem functioning. As a key process involved in carbon and nutrient cycles in terrestrial ecosystems, litter decomposition is sensitive to external N inputs. However, it remains unclear how the interactions of ultraviolet (UV) radiation, soil biodiversity (bacteria, fungi and invertebrates) and conventional drivers (e.g. ...
steppes, etc ; Dicrostonyx torquatus; Microtus; Pleistocene epoch; Russia; fauna; flora; forests; tundra; Show all 9 Subjects
Abstract:
... The results of the comprehensive study of zoogenic deposits in the Makhnevskaya-2 Cave (the north of the Middle Urals) made it possible to reconstruct gradual changes in the flora and fauna of the local territory during the Middle Valdai (Briansk) interstadial (MIS 3). The formation of deposits passed through three stages, which differ in proportions of tundra, steppe, and forest vegetation compon ...
steppes, etc ; Xanthoparmelia; dolomite; geographical distribution; lichens; thallus; Austria; Central European region; Show all 8 Subjects
Abstract:
... Bauer, N., Hüvös-Récsi, A., Lőkös, L. & Farkas, E. 2022. A new steppe element in the Vienna Basin, the first record of Xanthoparmelia pulvinaris (Parmeliaceae) for Austria. – Herzogia 35: 22–31. The first observation of Xanthoparmelia pulvinaris in Austria is reported. The soil-dwelling lichen species was found in significant amounts (∼1,000 thalli) in the eastern periphery of the Vienna Basin at ...
steppes, etc ; Leymus chinensis; agriculture; beef cattle; fungi; meadows; plant growth; stoichiometry; Show all 8 Subjects
Abstract:
... Grazing is the main utilization of native grassland, and forage fungal disease is one of the limiting factors of grassland productivity. The present research in the Hulunber meadow steppe grassland was conducted to investigate the responses of the dominant plant Leymus chinensis (Trin.) to beef cattle grazing, rust, and their interaction influence. Six grazing intensity treatments with three repli ...
steppes, etc ; Cassida; Chaetocnema; Crioceris; Pachybrachis; Phyllotreta; Russia; fauna; leaves; zoogeography; Kazakhstan; Show all 11 Subjects
Abstract:
... Data on 15 species of leaf beetles found in the southern steppe and semi-desert landscapes near the boundary between Europe and Asia (Orenburg Province) outside their previously known ranges are reported. Twelve species are recorded for the first time for Orenburg Province and for the Ural region as a whole: Crioceris bicruciata, Labidostomis metallica metallica, Cryptocephalus kerzhneri, C. tatar ...
steppes, etc ; forests; indigenous species; land; limestone; phytosociology; shrublands; Mediterranean region; Palestine; Show all 9 Subjects
Abstract:
... This paper describes a study on the vegetation and floristics of the territory of Beit Jibrin in Palestine, in areas such as Forest the Snabreh (Qasa), Khallet Mahmoud and Khallet AL-Taweel, among others. In view of the lack of studies on the phytosociology and communities of plants in the south-west of Palestine, as this region represents a unique diversity of plants, and the addition of these pl ...
steppes, etc ; Anoplocephalidae; Marmota; Spermophilus; genetic variation; ground squirrels; mitochondria; parasites; phylogeny; Eurasia; Show all 10 Subjects
Abstract:
... Cestodes Ctenotaenia marmotae are a widespread parasite of Eurasian ground squirrels. Being the only valid species of its genus, it has been recorded in ten host species from the genera Marmota and Spermophilus. Its definitive hosts live in similar ecological conditions and their area covers a wide geographical territory. Therefore, it remained unclear whether C. marmotae is a single species and h ...
steppes, etc ; Thymus seravschanicus; botany; forests; mature plants; shrubs; topographic slope; Central Asia; Show all 8 Subjects
Abstract:
... This study demonstrated the correlation between Thymus life-forms and conditions in the Tien Shan mountains, in which different vegetation belts can be located at different altitudes depending on a particular ridge. We selected four species of Thymus that are widespread in Tien Shan mountains (Thymus diminutus Klokov, Thymus dmitrievae Gamajun, Thymus karatavicus Dmitrieva, and Thymus seravschanic ...
steppes, etc ; atmospheric precipitation; catenas; climate; forests; lakes; pollen; sediments; temperature; trees; China; Show all 11 Subjects
Abstract:
... The regional expression of moisture conditions during the Younger Dryas (YD) event and its forcing mechanism in northeastern (NE) China are controversial and more evidence is needed. Here, we present a reconstruction of changes in vegetation and precipitation during the YD event, based on pollen data from two well-dated, parallel sediment cores (TC2 and GQ2) from Tianchi Crater Lake in NE China. T ...