东喜马拉雅勒布沟非飞行小型兽类物种多样性垂直分布格局

物种多样性沿海拔梯度的垂直分布格局在生物多样性研究与保护中受到广泛关注,中峰格局是物种多样性垂直分布四类格局中最为普遍的格局。中喜马拉雅沟谷的研究表明,小型兽类的垂直分布格局符合中峰模型。中喜马拉雅和东喜马拉雅具有相似的自然地理和气候条件,由此,推断东喜马拉雅沟谷的小型兽类垂直分布格局可能也符合中峰格局。为此,在东喜马拉雅勒布沟对非飞行小型兽类开展实地调查,选取研究海拔范围为2 300~5 000 m,沿海拔梯度连续设置9个300 m海拔段45个样方采集点,累计布夹16 200次,共采集标本372号,分属 3目5科10种。研究结果显示：该沟谷非飞行小型兽类物种丰富度在2 600~2 900 m海拔段出现峰值,随后随着海拔的升高递减,即从最低海拔到中海拔段上升至峰值后开始递减至趋于平缓,即显示出中峰格局特点。喜马拉雅山脉东西走向导致其南翼各沟谷拥有相似的地理和气候特征,如各沟谷都南北走向,受印度洋暖流气候影响,拥有相似的植被垂直带分布等,这使得非飞行小型兽类物种多样性垂直分布呈现出相似的特点,推论：在大尺度背景下,地理和气候条件可能是影响物种多样性垂直分布格局的关键因素。     

基于视觉廊道的青藏铁路沿线旅游动态景观评价

青藏铁路作为一种重要的"线性"廊道,不仅起着重要的区域连接作用,促进着区域经济和社会发展,还具有旅游观光和体验的功能。基于游客视角对青藏铁路沿线10个自然景观段进行了青藏铁路沿线旅游动态景观评价研究。详细界定了铁路沿线动态景观评价的对象,构建了"游客眼"——青藏铁路沿线动态景观评价模型。动态景观评价是基于旅游列车在行进过程中以旅游者的眼睛感受到的景观质量高低——景观基底(包括地貌景观多样性、动植物点缀度、人文景观丰富度等),在列车行进过程中哪些景观能被游客捕捉到受到景观视域(包括相对坡度、景观在视域内出现几率、距离的远近等)的制约,哪些景观能被游客留下深刻印象要受到景观美感(包括色彩、奇异罕见景观、水体配置等)的影响。搭建了青藏铁路沿线旅游动态景观评价指标体系,青藏铁路沿线旅游动态景观评价指标体系包括沿线景观基底指标、景观视域评价指标和景观动态美感指标3个类指标和9个基础指标,动态景观评价指标的选择和权重确定主要采用层次分析法(Analytic Hierarchy Process,简称AHP),动态景观评价主要是基于模糊综合评判方法。通过对青藏铁路沿线10个自然景观段的各指标量化打分以及计算,结果发现:青藏铁路沿线不同景观带给游客的感受差异很大,10个旅游景观段的景观质量从高到低排序为:念青唐古拉宽谷盆地高寒草原草甸景观段、昆仑高山荒漠与荒漠草原景观段、可可西里—长江源宽谷高寒草原景观段、唐古拉极高山高寒草甸景观段、青海湖盆地草甸草原景观段、怒江源宽谷高寒草甸景观段、拉萨河谷灌丛草原景观段、柴达木盆地东北亚高山荒漠草原景观段、湟水谷地温性草原景观段、柴达木盆地盐湖戈壁荒漠景观段。其中旅游动态景观质量极高的有1个,旅游动态景观质量较高的有6个,旅游动态景观质量一般的有2个,旅游动态景观质量低的有1个。客观评估青藏铁路沿线各景观段的景观,有助于游客预知和了解青藏铁路途中旅游景观质量,对于地方相关部门指导青藏铁路旅游业的发展和景观管理、打造、开发、决策提供了参考依据。     

Secretory kinase Fam20C tunes endoplasmic reticulum redox state via phosphorylation of Ero1α

Family with sequence similarity 20C (Fam20C), the physiological Golgi casein kinase, phosphorylates numerous secreted proteins that are involved in a wide variety of biological processes. However, the role of Fam20C in regulating proteins in the endoplasmic reticulum (ER) lumen is largely unknown. Here, we report that Fam20C interacts with various luminal proteins and that its depletion results in a more reduced ER lumen. We further show that ER oxidoreductin 1α (Ero1α), the pivotal sulfhydryl oxidase that catalyzes disulfide formation in the ER, is phosphorylated by Fam20C in the Golgi apparatus and retrograde‐transported to the ER mediated by ERp44. The phosphorylation of Ser145 greatly enhances Ero1α oxidase activity and is critical for maintaining ER redox homeostasis and promoting oxidative protein folding. Notably, phosphorylation of Ero1α is induced under hypoxia, reductive stress, and secretion‐demanding conditions such as mammalian lactation. Collectively, our findings open a door to uncover how oxidative protein folding is regulated by phosphorylation in the secretory pathway.     

Length-weight and length-length relationships of three fish species from the lower Yalong River,China

Length-weight relationships (LWRs) and length-length relationships (LLRs) were evaluated for three endemic fish species sampled from the lower Yalong River and its biggest tributary (the Anning River), in China. Specimens were captured using set gillnet (mesh size 4 cm) and backpack electro-fishing (power output 400 W, depth fished 1 m, area covered 3 m²) from June to July 2018. LWRs and LLRs are presented for the following species (Sinogastromyzon sichangensis, Micropercops swinhonis and Percocypris pingi).     

Erratum to: Herbal decoctosome is a novel form of medicine

Science China Life Sciences - Following the published article, we noticed an error duplication in Figure 5G “control” and “PGY-6” that was introduced during the revised...