Large but variable methane production in anoxic freshwater sediment upon addition of allochthonous and autochthonous organic matter [0.03%]
外来和自生有机物添加对淡水厌氧沉积物甲烷产生量的影响及其变化特征
Charlotte Grasset,Raquel Mendonça,Gabriella Villamor Saucedo et al.
Charlotte Grasset et al.
An important question in the context of climate change is to understand how CH4 production is regulated in anoxic sediments of lakes and reservoirs. The type of organic carbon (OC) present in lakes is a key factor controlling CH4 production...
Cheng-Shiuan Lee,Nicholas S Fisher
Cheng-Shiuan Lee
Phytoplankton may serve as a key entry for methylmercury (MeHg) into aquatic food webs however very few studies have quantified the bioconcentration of MeHg in marine phytoplankton from seawater, particularly for non-diatoms. Experiments us...
Avoiding timescale bias in assessments of coastal wetland vertical change [0.03%]
避免时间尺度偏差于沿海湿地垂直变化的评估中
Joshua L Breithaupt,Joseph M Smoak,Robert H Byrne et al.
Joshua L Breithaupt et al.
There is concern that accelerating sea-level rise will exceed the vertical growth capacity of coastal-wetland substrates in many regions by the end of this century. Vertical vulnerability estimates rely on measurements of accretion and/or s...
Taxon-specific contributions to silica production in natural diatom assemblages [0.03%]
自然藻类结合体中硅酸盐生产作用的门属特异性贡献率
Heather M McNair,Mark A Brzezinski,Claire P Till et al.
Heather M McNair et al.
The metabolic activity and growth of phytoplankton taxa drives their ecological function and contribution to biogeochemical processes. We present the first quantitative, taxon-resolved silica production rates, growth rates, and silica conte...
Ugo Marzocchi,Bo Thamdrup,Peter Stief et al.
Ugo Marzocchi et al.
The marine sediment hosts a mosaic of microhabitats. Recently it has been demonstrated that the settlement of phycodetrital aggregates can induce local changes in the benthic O2 distribution due to confined enrichment of organic material an...
Evidence for ubiquitous preferential particle orientation in representative oceanic shear flows [0.03%]
海洋代表性剪切流中普遍存在的颗粒择优取向的证据
Aditya R Nayak,Malcolm N McFarland,James M Sullivan et al.
Aditya R Nayak et al.
In situ measurements were undertaken to characterize particle fields in undisturbed oceanic environments. Simultaneous, co-located depth profiles of particle fields and flow characteristics were recorded using a submersible holographic imag...
Shiyu Rachel Wang,Daniela Di Iorio,Wei-Jun Cai et al.
Shiyu Rachel Wang et al.
We conducted a free-water mass balance-based study to address the rate of metabolism and net carbon exchange for the tidal wetland and estuarine portion of the coastal ocean and the uncertainties associated with this approach were assessed....
Wastewater influences nitrogen dynamics in a coastal catchment during a prolonged drought [0.03%]
污水影响了长期干旱下的河川集水区的氮动力学
Denise A Bruesewitz,Timothy J Hoellein,Rae F Mooney et al.
Denise A Bruesewitz et al.
Ecosystem function measurements can enhance our understanding of nitrogen (N) delivery in coastal catchments across river and estuary ecosystems. Here, we contrast patterns of N cycling and export in two rivers, one heavily influenced by wa...
Bloom termination of the toxic dinoflagellate Alexandrium catenella: Vertical migration behavior, sediment infiltration, and benthic cyst yield [0.03%]
亚历山大藻（Alexandrium catenella）终止 bloom 的机制：水休眠体的垂直迁移、沉积及埋藏效应
Michael L Brosnahan,David K Ralston,Alexis D Fischer et al.
Michael L Brosnahan et al.
New resting cyst production is crucial for the survival of many microbial eukaryotes including phytoplankton that cause harmful algal blooms. Production in situ has previously been estimated through sediment trap deployments, but here was i...
Reach-scale river metabolism across contrasting sub-catchment geologies: Effect of light and hydrology [0.03%]
光照和水文条件对不同小流域地质条件下河流代谢的影响
Lorenzo Rovelli,Karl M Attard,Andrew Binley et al.
Lorenzo Rovelli et al.
We investigated the seasonal dynamics of in-stream metabolism at the reach scale (∼ 150 m) of headwaters across contrasting geological sub-catchments: clay, Greensand, and Chalk of the upper River Avon (UK). Benthic metabolic activity was ...