Questions Livestock management in rangelands depends on the production of plant biomass. Biomass is driven by temporal and spatial variability precipitation, but our understanding how precipitation mediates grazing effects biomass still fragmented. Along a 600-km gradient we extracted data to ask questions: (a) what are intensity production; (b) does interact with species richness affect (c) do...

Abstract. Arctic warming and permafrost degradation are modifying northern ecosystems through changes in microtopography, soil water dynamics, nutrient availability, vegetation succession. Upon degradation, the release of deep stores nutrients, such as nitrogen phosphorus, from newly thawed stimulates production. More specifically, wetter lowlands show an increase sedges (as part graminoids), w...

The northern bog lemming Synaptomys borealis (NBL) is a rare small mammal that undergoing federal Species Status Assessment (SSA) under the US Endangered Act. Despite wide North American distribution, very little known about NBL dietary or habitat needs, both of which are germane to resiliency this species climate change. To quantify diet composition in Alaska, we used DNA metabarcoding from 59...

Reallocation of nutrients from roots to shoots is essential for plant regrowth in grasslands, particularly nutrient-poor conditions. However, the response root nutrient reallocation changes nitrogen (N) and water availability remains largely unknown. Using a novel 15N 32P labelling technique, we quantified contribution N phosphorus (P) shoot either or direct soil uptake perennial grasses expose...

The enhanced dietary flexibility of early hominins to include consumption of C4/crassulacean acid metabolism (CAM) foods (i.e., foods derived from grasses, sedges, and succulents common in tropical savannas and deserts) likely represents a significant ecological and behavioral distinction from both extant great apes and the last common ancestor that we shared with great apes. Here, we use stabl...

The genus name Limnobaris Bedel is applied in a restricted sense to baridine weevils with a covered pygidium and non-prominent, decussate mandibles which occur on sedges in the Palaearctic Region and immediately adjacent parts of tropical Southeast Asia. Calyptopygus Marshall and Pertorcus Voss are syn. n. of Limnobaris. Some species from Africa and the Americas are maintained provisionally in ...

Worldwide, many plant species are experiencing an earlier onset of spring phenophases due to climate warming. Rapid recent temperature increases on the Tibetan Plateau (TP) have triggered changes in the spring phenology of the local vegetation. However, remote sensing studies of the land surface phenology have reached conflicting interpretations about green-up patterns observed on the TP since ...

[1] Peatlands are a large natural source of atmospheric methane (CH4), and the sedgeCarex rostrata plays a critical role in the production, oxidation, and transport of CH4 in these systems. This 4 year clipping experiment examined the changes in CH4 emissions from a temperate peatland after removing all aboveground C. rostrata biomass. Methane fluxes, dissolved CH4, and environmental variables ...

The oribatid mite genus Protoribates Berlese (Haplozetidae) is reviewed for North America and the genus diagnosis is revised to account for the North American species, Protoribates robustior (Jacot, 1937) is redescribed and newly reported from western North America and a new species from Alberta is described. Protoribates haughlandae sp. n. is bisexual, heterotridactylous, and lives primarily i...