我々は、沿岸と外洋水の低酸素領域で進行中の研究を支援するためのイノベーション、ブリティッシュコロンビア州の知識開発基金と国立科学およびカナダの工学研究審議会（NSERC）のためのカナダの財団に感謝の意を表します。さらに、DAWはNSERC、キラムとトゥーラ基礎微生物の多様性と進化のための資金を供給センターからの奨学金によって支えられている。

パート1：水コレクション<ol><li>深さは、各キャストに割り当てられます。 </li><li>サンプリングすると、総容積は現在のキャストのために収集される深さが決定されます。 </li><li>それは、Go - FloとLニスキンボトルが開いていること、およびそれらのバルブと水栓が閉じていることを保証されます。 </li><li> CTDは、水へのラインと下側の底部上にロードされます。 </li><li>最初のキャストでサンプリングした最も深い深度のボトルは、CTDの後の行にロードされます、それはラインが正しくブラケットに装着されており、ネジが締められていることを保証されます。 </li><li>メッセンジャーが低下する前に（最深のものを除く）の各ボトルに添付されます。 </li><li>ラインは、まず深さと横の間の距離を下げて、別の瓶がロードされます。それは、20Lのろ過のために収集される深さのために、2 12Lボトルの合計が離れて0.75メートル程度連続してロードされていることに留意すべきである。 </li><li>一度、すべてのボトルがライン上にある、ラインは所望の深さまで低下し、2分、通過が許可されています。 </li><li>メッセンジャーはダウン送信され、数分は、近くにすべてのボトルを確実に渡すことが許可されています。 </li><li>ラインが​​で目前されており、彼らはラックの上に出てくるようにボトルがアンロードされます。 </li><li> DNAとRNAの20Lのサンプルを必要とする深さには、2つのニスキンボトルが収集されます。他のカーボイに排水されている間一瓶は、（下記参照）の化学パラメータをサンプリングするために使用されます。 RNAは、第二ニスキンから即座に収集されます。最初の残りの部分は、また〜20L、最終的なボリュームを与えるためにカーボイに排出される。水ののみ1L低解像度のサンプルについては滅菌Nalgeneのボトルにろ過のために確保されています。 </li></ol>第2部：ガスサンプルの収集<ol><li>酸素のサンプルが必要な場合は、それらが最初に収集されます。 </li><li>細いチューブの部分は、Lニスキンに添付されます/移動- floの栓とチューブのもう一方の端はガラス血清ボトルに場所に置かれます。 </li><li>血清ボトルは、試料を水で3回リンスし、そしてに気泡が存在しないことなどがオーバーフローに満ちている。 </li><li> 50μlの塩化水銀（HgCl 2）サンプル中に気泡を導入していない方法で、血清ボトルに追加されます。 </li><li>瓶は、ゴム栓とアルミキャップを使用して圧着してシールされる、としてクーラーに氷の上に格納されています。 </li></ol>パート3：栄養のサンプルコレクション<ol><li> 60 ccシリンジは、試料水でリンスされ、（0.2μm）と、いくつかの水ラインに接続されているアクロディスクによってプッシュされます。 </li><li>ポリエチレン瓶は、（すすぎ時にボトルを振る）〜10ミリリットルろ過された水で3回リンスする。 </li><li>ろ過した試料水は、約、ボトルに追加されます¾いっぱい。 </li><li>サンプルは、クーラーに氷の上に格納されています。 </li></ol>パート4：アンモニアのサンプルコレクション<ol><li>サンプルチューブは、サンプル水で洗浄されています。 </li><li>サンプルチューブは、サンプル水で完全に充填されています。 </li><li>サンプル水を5mlのは、10mlのピペットを使用して取り出され、チューブ内の水の残りは破棄され、ピペットチップで5ミリリットルのサンプルチューブに置き換えられます。 </li><li>全ての深さからサンプルが収集された後アンモニウム作業試薬の7.5ミリリットルを各チューブに添加される。 </li></ol>パート5：セルの列挙のサンプルコレクション<ol><li> 5.4ミリリットルの37％ホルムアルデヒドを含む事前に標識した50mlファルコンチューブは4％の最終濃度のために先頭に入力されます。ケアは、こぼさないように取られます。 </li></ol>パート6：硫化水素測定用のサンプルコレクション<ol><li> 20％の酢酸亜鉛（亜鉛（O 2 CCH 3）2）を含む事前に標識した50mlファルコンチューブは、上部に充填されている。ケアは、こぼさないように取られます。 </li></ol>パート7：バイオマス濃度のため少量コレクション<ol><li> 1リットルのボトルは、上部に満ちている。 </li></ol>パート8：バイオマス濃度のための大ボリュームのコレクション<ol><li> 20リットルその他これらに満ちている。 </li></ol>パート9：代表的な結果約12溶存酸素のサンプルを、32から48までガス試料、16栄養素のサンプル、32アンモニウムのサンプル、16硫化水素のサンプル、細胞数の16試料、6 20リットルその他これら、16 1リットルボトルで結果をサンプリング海水の最終結果以降RNAで保存微生物バイオマスを含む4 Sterivex0.22μmフィルター。

<ol>
	<li>Cline, J. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Spectrophotometric+determination+of+hydrogen+sulfide+in+natural+waters.">Spectrophotometric determination of hydrogen sulfide in natural waters.</a> Limnology &#38; Oceanography. 14, 454-458 (1969).</li><li>Holmes, R. M., Aminot, A., Kerouel, R., Hooker, B. A., Peterson, B. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+simple+and+precise+method+for+measuring+ammonium+in+marine+and+freshwater+ecosystems.">A simple and precise method for measuring ammonium in marine and freshwater ecosystems.</a> Canadian Journal of fisheries and Aquatic Science. 56, 1801-1808 (1999).</li></ol>

The authors have nothing to disclose.

全体的に、サンプリングのこのタイプに必要な準備と計画には大量の順番とすべてをクリーンアップするため、その後、一日で事を得るために2日間の旅行の前に予算がそう、そこです。一般的には、海水が蠕動ポンプとか、フィールド機器を輸送するために使用されるアルミニウムZargesボックスに接触させてはいけない。尊敬して機器を扱い、それが来るのに長い時間のためにも実行されま...

<table><tbody><tr><td>20L Carboys</td><td></td><td>Fisher Scientific</td><td>02-960-15</td><td></td></tr><tr><td>3/8&quot; Tygon</td><td></td><td>Cole-Parmer</td><td>06429-36</td><td></td></tr><tr><td>Sterivex filters</td><td></td><td>Fisher Scientific</td><td>SVG010RS</td><td></td></tr><tr><td>Prefilter Housing Unit</td><td></td><td>AMD</td><td>501200</td><td></td></tr><tr><td>Luer Fitting</td><td></td><td>Cole-Parmer</td><td>31507-27</td><td></td></tr><tr><td>1/4&quot; Tygon tubing</td><td></td><td>Cole-Parmer</td><td>06429-24</td><td></td></tr><tr><td>1/4&quot; Tygon tubing</td><td></td><td>Cole-Parmer</td><td>06429-24</td><td></td></tr><tr><td>1/4&quot; Tygon tubing</td><td></td><td>Cole-Parmer</td><td>06429-24</td><td></td></tr><tr><td>50ml Plastic tubes</td><td></td><td></td><td></td><td></td></tr><tr><td>Glass Serum Bottles</td><td></td><td></td><td></td><td>Glass Sample Collection</td></tr><tr><td>Septa and aluminum caps for glass serum bottles</td><td></td><td></td><td></td><td></td></tr><tr><td>Hand Crimper</td><td></td><td></td><td></td><td></td></tr><tr><td>20-200ul Pipette and Tips</td><td></td><td></td><td></td><td></td></tr><tr><td>Glass Tubes</td><td></td><td></td><td></td><td>Ammonium Sample Collection</td></tr><tr><td>30ml Plastic Bottles</td><td></td><td></td><td></td><td>Nutrient Collection</td></tr><tr><td>Acrodisc Filters</td><td></td><td>EMD Millipore</td><td></td><td></td></tr><tr><td>5 ml Tubes</td><td></td><td></td><td></td><td>Nitrite Sample Collection</td></tr><tr><td>37% Formaldehyde</td><td>Reagent</td><td></td><td></td><td>For cell count samples</td></tr><tr><td>20% Zinc Acetate</td><td>Reagent</td><td></td><td></td><td>For sulfide samples</td></tr><tr><td>Mercuric Chloride</td><td>Reagent</td><td></td><td></td><td>For gas samples</td></tr><tr><td>milliQ water</td><td>Reagent</td><td></td><td></td><td></td></tr><tr><td>Ammonium Working Reagent</td><td>Reagent</td><td></td><td></td><td>Borate buffer, sodium sulfite, orthophaladialdehyde</td></tr><tr><td>Sulfanilamide</td><td>Reagent</td><td></td><td></td><td>5g into 450ml water and 50ml HCl</td></tr><tr><td>N-(1-naphthy)-ethylenediamine dihydrochloride solution</td><td>Reagent</td><td></td><td></td><td>0.5g into 500ml water</td></tr></tbody></table>

seawater sampling and collection

このビデオでは、文書の沿岸海洋水のサンプルを収集し、バイオマス濃度、核酸精製、細胞の豊富さ、栄養および微量ガス分析を含む様々なダウンストリームアプリケーションのためにそれらを処理するための方法を。今日のデモのサンプルについてはサーニッチのインレットでHMSジョンストリックランドの動作のデッキから採取された。多目的ウインチとケーブルシステムとフレームデリッ​​クは、、ニスキンまたは移動 - FLO採水ボトルと組み合わせて使用​​されています。導電率、温度、および奥行き（CTD）のセンサーはまた、基礎となる水塊をサンプリングするために使用されます。アウトガス最小限に抑えるために、微量のガス試料が最初に収集されます。次に、栄養素、水の化学、および細胞数が決定されます。最後に、水がバイオマスのろ過のために収集されます。シングルキャストのセットアップおよび収集時間は、215メートルの最大深さで〜1.5時間です。したがって、6時間の合計は、一般的にここで説明するコレクションのシリーズを完了するために必要です。

Watch this Scientific Journal Video about Seawater Sampling and Collection at JoVE.com

Seawater Sampling and Collection

このビデオでは、文書の沿岸海洋水のサンプルを収集し、バイオマス濃度、核酸精製、細胞の豊富さ、栄養および微量ガス分析を含む様々なダウンストリームアプリケーションのためにそれらを処理するための方法を。

海水のサンプリングとコレクション

This video documents methods for collecting coastal marine water samples and processing them for various downstream applications including biomass ...

Universidad de Cartagena UDEC

Research

JoVE Journal

Biology

19.9K ビュー.  University of British Columbia - UBC. このビデオでは、文書の沿岸海洋水のサンプルを収集し、バイオマス濃度、核酸精製、細胞の豊富さ、栄養および微量ガス分析を含む様々なダウンストリームアプリケーションのためにそれらを処理するための方法を。

ビデオ: Seawater Sampling and Collection

Unraveling the Unseen Players in the Ocean - A Field Guide to Water Chemistry and Marine Microbiology

Here we introduce a series of thoroughly tested and well standardized research protocols adapted for use in remote marine environments. The sampling protocols include the assessment of resources available to the microbial community (dissolved organic carbon, particulate organic matter, inorganic nutrients), and a comprehensive description of the viral and bacterial communities (via direct viral and microbial counts, enumeration of autofluorescent microbes, and construction of viral and microbial metagenomes). We use a combination of methods, which represent a dispersed field of scientific disciplines comprising already established protocols and some of the most recent techniques developed. Especially metagenomic sequencing techniques used for viral and bacterial community characterization, have been established only in recent years, and are thus still subjected to constant improvement. This has led to a variety of sampling and sample processing procedures currently in use. The set of methods presented here provides an up to date approach to collect and process environmental samples. Parameters addressed with these protocols yield the minimum on information essential to characterize and understand the underlying mechanisms of viral and microbial community dynamics. It gives easy to follow guidelines to conduct comprehensive surveys and discusses critical steps and potential caveats pertinent to each technique.

Here, we present a comprehensive protocol to assess the organic and inorganic nutrient availability and the abundance and structure of microbial and viral communities in remote marine environments.

水化学と海洋微生物学へのフィールドガイド - 海における幽玄選手の解明

Here we introduce a series of thoroughly tested and well standardized research protocols adapted for use in remote marine environments. The sampling ...

環境学

Clean Sampling and Analysis of River and Estuarine Waters for Trace Metal Studies

Most of the trace metal concentrations in ambient waters obtained a few decades ago have been considered unreliable owing to the lack of contamination control. Developments of some techniques aiming to reduce trace metal contamination in the last couple of decades have resulted in concentrations reported now being orders of magnitude lower than those in the past. These low concentrations often necessitate preconcentration of water samples prior to instrumental analysis of samples. Since contamination can appear in all phases of trace metal analyses, including sample collection (and during preparation of sampling containers), storage and handling, pretreatments, and instrumental analysis, specific care needs to be taken in order to reduce contamination levels at all steps. The effort to develop and utilize "clean techniques" in trace metal studies allows scientists to investigate trace metal distributions and chemical and biological behavior in greater details. This advancement also provides the required accuracy and precision of trace metal data allowing for environmental conditions to be related to trace metal concentrations in aquatic environments.
This protocol that is presented here details needed materials for sample preparation, sample collection, sample pretreatment including preconcentration, and instrumental analysis. By reducing contamination throughout all phases mentioned above for trace metal analysis, much lower detection limits and thus accuracy can be achieved. The effectiveness of "clean techniques" is further demonstrated using low field blanks and good recoveries for standard reference material. The data quality that can be obtained thus enables the assessment of trace metal distributions and their relationships to environmental parameters.

Special care using "clean techniques" is required to properly collect and process water samples for trace metal studies in aquatic environments. A protocol for sampling, processing, and analytical procedures with the aim of obtaining reliable environmental monitoring data and results with high sensitivity for detailed trace metal studies is presented.

きれいなサンプリングと微量金属の研究のために川や河口ウォーターズの分析

Most of the trace metal concentrations in ambient waters obtained a few decades ago have been considered unreliable owing to the lack of contamination ...

Watershed Planning within a Quantitative Scenario Analysis Framework

There is a critical need for tools and methodologies capable of managing aquatic systems within heavily impacted watersheds. Current efforts often fall short as a result of an inability to quantify and predict complex cumulative effects of current and future land use scenarios at relevant spatial scales. The goal of this manuscript is to provide methods for conducting a targeted watershed assessment that enables resource managers to produce landscape-based cumulative effects models for use within a scenario analysis management framework. Sites are first selected for inclusion within the watershed assessment by identifying sites that fall along independent gradients and combinations of known stressors. Field and laboratory techniques are then used to obtain data on the physical, chemical, and biological effects of multiple land use activities. Multiple linear regression analysis is then used to produce landscape-based cumulative effects models for predicting aquatic conditions. Lastly, methods for incorporating cumulative effects models within a scenario analysis framework for guiding management and regulatory decisions (e.g., permitting and mitigation) within actively developing watersheds are discussed and demonstrated for 2 sub-watersheds within the mountaintop mining region of central Appalachia. The watershed assessment and management approach provided herein enables resource managers to facilitate economic and development activity while protecting aquatic resources and producing opportunity for net ecological benefits through targeted remediation.

There is a critical need for tools and methodologies capable of managing aquatic systems in the face of uncertain future conditions. We provide methods for conducting a targeted watershed assessment that enables resource managers to produce landscape-based cumulative effects models for use within a scenario analysis management framework.

定量的シナリオ分析フレームワーク内の流域計画

There is a critical need for tools and methodologies capable of managing aquatic systems within heavily impacted watersheds. Current efforts often fall ...

VacuSIP, an Improved InEx Method for In Situ Measurement of Particulate and Dissolved Compounds Processed by Active Suspension Feeders

Benthic suspension feeders play essential roles in the functioning of marine ecosystems. By filtering large volumes of water, removing plankton and detritus, and excreting particulate and dissolved compounds, they serve as important agents for benthic-pelagic coupling. Accurately measuring the compounds removed and excreted by suspension feeders (such as sponges, ascidians, polychaetes, bivalves) is crucial for the study of their physiology, metabolism, and feeding ecology, and is fundamental to determine the ecological relevance of the nutrient fluxes mediated by these organisms. However, the assessment of the rate by which suspension feeders process particulate and dissolved compounds in nature is restricted by the limitations of the currently available methodologies. Our goal was to develop a simple, reliable, and non-intrusive method that would allow clean and controlled water sampling from a specific point, such as the excurrent aperture of benthic suspension feeders, in situ. Our method allows simultaneous sampling of inhaled and exhaled water of the studied organism by using minute tubes installed on a custom-built manipulator device and carefully positioned inside the exhalant orifice of the sampled organism. Piercing a septum on the collecting vessel with a syringe needle attached to the distal end of each tube allows the external pressure to slowly force the sampled water into the vessel through the sampling tube. The slow and controlled sampling rate allows integrating the inherent patchiness in the water while ensuring contamination free sampling. We provide recommendations for the most suitable filtering devices, collection vessel, and storing procedures for the analyses of different particulate and dissolved compounds. The VacuSIP system offers a reliable method for the quantification of undisturbed suspension feeder metabolism in natural conditions that is cheap and easy to learn and apply to assess the physiology and functional role of filter feeders in different ecosystems.

VacuSIP, an Improved InEx Method for In Situ Measurement of Particulate and Dissolved Compounds Processed by Active Suspension Feeders

We introduce the VacuSIP, a simple, non-intrusive, and reliable method for clean and accurate point sampling of water. The system was developed and evaluated for the simultaneous collection of the water inhaled and exhaled by benthic suspension feeders in situ, to cleanly measure removal and excretion of particulate and dissolved compounds.

VacuSIP、のための改良INEX方法<em&gt;その場で</em&gt;微粒子と溶解した化合物の測定は、アクティブサスペンションフィーダによって処理します

Benthic suspension feeders play essential roles in the functioning of marine ecosystems. By filtering large volumes of water, removing plankton and ...

Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis

Microplastic pollution in the marine environment is a scientific topic that has received increasing attention over the last decade. The majority of scientific publications address microplastic pollution of the sea surface. The protocol below describes the methodology for sampling, sample preparation, separation and chemical identification of microplastic particles. A manta net fixed on an &#187;A frame&#171; attached to the side of the vessel was used for sampling. Microplastic particles caught in the cod end of the net were separated from samples by visual identification and use of stereomicroscopes. Particles were analyzed for their size using an image analysis program and for their chemical structure using ATR-FTIR and micro FTIR spectroscopy. The described protocol is in line with recommendations for microplastics monitoring published by the Marine Strategy Framework Directive (MSFD) Technical Subgroup on Marine Litter. This written protocol with video guide will support the work of researchers that deal with microplastics monitoring all over the world.

The protocol below describes the methodology for: microplastics sampling on the sea surface, separation of microplastic and chemical identification of particles. This protocol is in line with the recommendations for microplastics monitoring published by the MSFD Technical Subgroup on Marine Litter.

海面とサンプル分析にMicroplasticsサンプリングのためのプロトコル

Microplastic pollution in the marine environment is a scientific topic that has received increasing attention over the last decade. The majority of ...

Continuous Instream Monitoring of Nutrients and Sediment in Agricultural Watersheds

Pollutant concentrations and loads in watersheds vary considerably with time and space. Accurate and timely information on the magnitude of pollutants in water resources is a prerequisite for understanding the drivers of the pollutant loads and for making informed water resource management decisions. The commonly used &#34;grab sampling&#34; method provides the concentrations of pollutants at the time of sampling (i.e., a snapshot concentration) and may under- or overpredict the pollutant concentrations and loads. Continuous monitoring of nutrients and sediment has recently received more attention due to advances in computing, sensing technology, and storage devices. This protocol demonstrates the use of sensors, sondes, and instrumentation to continuously monitor in situ nitrate, ammonium, turbidity, pH, conductivity, temperature, and dissolved oxygen (DO) and to calculate the loads from two streams (ditches) in two agricultural watersheds. With the proper calibration, maintenance, and operation of sensors and sondes, good water quality data can be obtained by overcoming challenging conditions such as fouling and debris buildup. The method can also be used in watersheds of various sizes and characterized by agricultural, forested, and/or urban land.

With the advancement of technology and the rise in end-user expectations, the need and use of higher temporal resolution data for pollutant load estimation has increased. This protocol describes a method for continuous in situ water quality monitoring to obtain higher temporal resolution data for informed water resource management decisions.

連続インストリームの栄養素と農業生態系流域における堆積物の監視

Pollutant concentrations and loads in watersheds vary considerably with time and space. Accurate and timely information on the magnitude of pollutants in ...

An Ultra-clean Multilayer Apparatus for Collecting Size Fractionated Marine Plankton and Suspended Particles

The distributions of many trace elements in the ocean are strongly associated with the growth, death, and re-mineralization of marine plankton and those of suspended/sinking particles. Here, we present an all plastic (Polypropylene and Polycarbonate), multi-layer filtration system for collection of suspended particulate matter (SPM) at sea. This ultra-clean sampling device has been designed and developed specifically for trace element studies. Meticulous selection of all non-metallic materials and utilization of an in-line flow-through procedure minimizes any possible metal contamination during sampling. This system has been successfully tested and tweaked for determining trace metals (e.g., Fe, Al, Mn, Cd, Cu, Ni) on particles of varying size in coastal and open ocean waters. Results from the South China Sea at the South East Asia Time-Series (SEATS) station indicate that diurnal variations and spatial distribution of plankton in the euphotic zone can be easily resolved and recognized. Chemical analysis of size-fractionated particles in surface waters of the Taiwan Strait suggests that the larger particles (&#62;153 &#181;m) were mostly biologically derived, while the smaller particles (10 - 63 &#181;m) were mostly composed of inorganic matter. Apart from Cd, the concentrations of metals (Fe, Al, Mn, Cu, Ni) decreased with increasing size.

Plankton and suspended particles play a major role in the biogeochemical cycles in the ocean. Here, we provide an ultra-clean, low stress method for the collection of various sizes of particles and plankton at sea with the capability of handling large volumes of seawater.

サイズ分画した海洋プランクトンや懸濁粒子を収集するための超きれいな積層装置

The distributions of many trace elements in the ocean are strongly associated with the growth, death, and re-mineralization of marine plankton and those ...

Sampling, Sorting, and Characterizing Microplastics in Aquatic Environments with High Suspended Sediment Loads and Large Floating Debris

The ubiquitous presence of plastic debris in the ocean is widely recognized by the public, scientific communities, and government agencies. However, only recently have microplastics in freshwater systems, such as rivers and lakes, been quantified. Microplastic sampling at the surface usually consists of deploying drift nets behind either a stationary or moving boat, which limits the sampling to environments with low levels of suspended sediments and floating or submerged debris. Previous studies that employed drift nets to collect microplastic debris typically used nets with &#8805;300 &#181;m mesh size, allowing plastic debris (particles and fibers) below this size to pass through the net and elude quantification. The protocol detailed here enables: 1) sample collection in environments with high suspended loads and floating or submerged debris and 2) the capture and quantification of microplastic particles and fibers &lt;300 &#181;m. Water samples were collected using a peristaltic pump in low-density polyethylene (PE) containers to be stored before filtering and analysis in the lab. Filtration was done with a custom-made microplastic filtration device containing detachable union joints that housed nylon mesh sieves and mixed cellulose ester membrane filters. Mesh sieves and membrane filters were examined with a stereomicroscope to quantify and separate microplastic particulates and fibers. These materials were then examined using a micro-attenuated total reflectance Fourier transform infrared spectrometer (micro ATR-FTIR) to determine microplastic polymer type. Recovery was measured by spiking samples using blue PE particulates and green nylon fibers; percent recovery was determined to be 100% for particulates and 92% for fibers. This protocol will guide similar studies on microplastics in high velocity rivers with high concentrations of sediment. With simple modifications to the peristaltic pump and filtration device, users can collect and analyze various sample volumes and particulate sizes.

Most microplastic research to date has occurred in marine systems where suspended solid levels are relatively low. Focus is now shifting to freshwater systems, which may feature high sediment loads and floating debris. This protocol addresses collecting and analyzing microplastic samples from aquatic environments that contain high suspended solid loads.

サンプリング、並べ替え、および高い浮遊負荷と大きい浮遊残骸水圏環境における Microplastics の特性

The ubiquitous presence of plastic debris in the ocean is widely recognized by the public, scientific communities, and government agencies. However, only ...

Large Volume (20L+) Filtration of Coastal Seawater Samples

The workflow begins with the collection of coastal marine waters for downstream microbial community, nutrient and trace gas analyses. For this method, samples were collected from the deck of the HMS John Strickland operating in Saanich Inlet. This video documents large volume (&ge;20 L) filtration of microbial biomass, ranging between 0.22&mu;m and 2.7&mu;m in diameter, from the water column. Two 20L samples can be filtered simultaneously using a single pump unit equipped with four rotating heads. Filtration is done in the field on extended trips, or immediately upon return for day trips. It is important to record the amount of water passing through each sterivex filter unit. To prevent biofilm formation between sampling trips, all filtration equipment must be rinsed with dilute HCl and deionized water and autoclaved immediately after use. This procedure will take approximately 5 hours plus an additional hour for clean up.

Large Volume 20L+ Filtration of Coastal Seawater Samples

This video documents large volume (&ge;20 L) filtration of microbial biomass, ranging between 0.22&mu;m and 2.7&mu;m in diameter, from the water column.

沿岸海水サンプルの大容量（20L +）ろ過

The workflow begins with the collection of coastal marine waters for downstream microbial community, nutrient and trace gas analyses. For this method, ...

生物学

Small Volume (1-3L) Filtration of Coastal Seawater Samples

The workflow begins with the collection of coastal marine waters for downstream microbial community, nutrient and trace gas analyses. For today s demonstration samples were collected from the deck of the HMS John Strickland operating in Saanich Inlet. This video documents small volume (~1 L) filtration of microbial biomass from the water column. The protocol is an extension of the large volume sampling protocol described earlier, with one major difference: here, there is no pre-filtration step, so all size classes of biomass are collected down to the 0.22 &mu;m filter cut-off. Samples collected this way are ideal for nucleic acid analysis. The set-up, filtration, and clean-up steps each take about 20-30 minutes. If using two peristaltic pumps simultaneously, up to 8 samples may be filtered at the same time. To prevent biofilm formation between sampling trips, all filtration equipment must be rinsed with dilute HCl and deionized water and autoclaved immediately after use.

Small Volume 1-3L Filtration of Coastal Seawater Samples

This video documents small volume (~1 L) filtration of microbial biomass from the water column.

海水のサンプリングとコレクション

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