Characteristics and impacts of solid waste on giant panda habitat in Wanglang Nature Reserve.

Systematic research on solid waste pollution in giant panda habitat is lacking. To fill in this gap in the literature, a survey for solid waste was conducted in Wanglang Nature Reserve in July and August of 2018 and 2019. A total of 16 transects, 16 giant panda habitat plots, 16 livestock habitat plots, and 16 common habitat plots were surveyed.

Evaluating the effects of roads on giant panda habitat at two scales in a typical nature reserve.

Little is known about how roads affect the habitats of giant pandas (Ailuropoda melanoleuca), this study aimed to provide a scientific basis to better understand this question, and to formulate targeted measures to reduce the adverse effects of roads. To evaluate the effects of roads on giant panda habitat, a field survey was carried out in the Wanglang Nature Reserve at two scales, 400 m and 100 m, in July and August of every year from 2015 to 2019. We compared the community characteristics of roadside habitats, giant panda habitats and the local environment by using difference tests and multiple comparison methods.

Regulation of nonylphenol-induced reproductive toxicity in mouse spermatogonia cells by miR-361-3p.

Nonylphenol (NP) is an environmental chemical that affects apoptosis and male infertility. In our study, we found that a high concentration of NP could down-regulate the expression of microRNA-361-3p (miR-361-3p) in the murine GC-1 spermatogonia cell line and in vivo in murine spermatogonia. Additionally, one direct target of this miR, the 3' untranslated region of Killin (Klln) mRNA, was identified.

Effects of land use change on soil carbon storage and water consumption in an oasis-desert ecotone.

Land use and ecosystem services need to be assessed simultaneously to better understand the relevant factors in sustainable land management. This paper analyzed land use changes in the middle reach of the arid Heihe River Basin in northwest China over the last two decades and their impacts on water resources and soil organic carbon (SOC) storage. The results indicated that from 1986 to 2007: (1) cropland and human settlements expanded by 45.

Treeline dynamics in response to climate change in the Min Mountains, southwestern China.

Background: Abies faxoniana is the dominant plant species of the forest ecosystem on the eastern edge of Qinghai-Tibet Plateau, where the treeline is strongly defined by climate. The tree-ring chronologies and age structure of Abies faxoniana were developed in the treeline ecotones on the northwestern and southeastern aspects of the Min Mountains in the Wanglang Nature Reserve to examine the treeline dynamics of recent decades in response to climate change.

Results: On the northwestern aspect, correlation analysis showed that the radial growth was significantly and positively correlated with precipitation in current January and monthly mean temperature in current April, but significantly and negatively correlated with monthly mean temperature in previous August.

[Responses of Picea likiangensis radial growth to climate change in the Small Zhongdian area of Yunnan Province, Southwest China].

Picea likiangensis (Franch. ) Pritz. primary forest is one of the dominant forest types in the Small Zhongdian area in Shangri-La County of Yunnan Province.

[Advancement of rotational alignment of femoral prosthesis in total knee arthroplasty].

Objective: To introduce the concept and clinical applications of rotational alignment of the femoral prosthesis in total knee arthroplasty (TKA) so as to avoided the postoperative complications caused by rotational alignment.

Methods: The clinical and experimental research literature about rotational alignment of the femoral prosthesis in TKA was extensively reviewed and analyzed.

Results: Femoral prosthesis malrotation can lead to flexion gap unbalanced and undesirable patellar track.

[Habitat selection attributes of giant panda].

Based on the 1997-2009 inventory data of Wanglang Nature Reserve, the habitat selection attributes of giant panda were studied from the aspects of topography, forest community structure, and main feeding bamboo by the methods of frequency distribution and Bailey. The giant panda had obvious habitat preferences. Topographically, the preferred microhabitat was on the even or convex slopes at the ridge, top, or middle part of mountain body at an elevation 2500-3000 m, with southwest aspect, 6 degrees-30 degrees, and the distance to the nearest water source > 300 m.