説明
The National Lakes Assessment (NLA) is a first-ever statistically-valid survey of the biological condition of lakes and reservoirs throughout the U.S. The U.S. Environmental Protection Agency (EPA) worked with states and tribes to conduct the assessment in 2007. These are the results of the assessment for zooplankton.
データ レコード
この オカレンス（観察データと標本) リソース内のデータは、1 つまたは複数のデータ テーブルとして生物多様性データを共有するための標準化された形式であるダーウィン コア アーカイブ (DwC-A) として公開されています。 コア データ テーブルには、17,498 レコードが含まれています。
この IPT はデータをアーカイブし、データ リポジトリとして機能します。データとリソースのメタデータは、 ダウンロード セクションからダウンロードできます。 バージョン テーブルから公開可能な他のバージョンを閲覧でき、リソースに加えられた変更を知ることができます。
バージョン
次の表は、公にアクセス可能な公開バージョンのリソースのみ表示しています。
引用方法
研究者はこの研究内容を以下のように引用する必要があります。:
U.S. Environmental Protection Agency (USEPA). 2009. National Lakes Assessment: A Collaborative Survey of the Nation’s Lakes. EPA 841-R-09-001. U.S. Environmental Protection Agency, Office of Water and Office of Research and Development, Washington, D.C.
権利
研究者は権利に関する下記ステートメントを尊重する必要があります。:
パブリッシャーとライセンス保持者権利者は United States Geological Survey。 To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction.
GBIF登録
このリソースをはGBIF と登録されており GBIF UUID: 111105f7-661d-416e-bb9d-9e291d5fdb1fが割り当てられています。 GBIF-US によって承認されたデータ パブリッシャーとして GBIF に登録されているUnited States Geological Survey が、このリソースをパブリッシュしました。
キーワード
Occurrence; assessment; zooplankton; Observation
連絡先
- 最初のデータ採集者 ●
- 連絡先
- 最初のデータ採集者
- メタデータ提供者
地理的範囲
geographic scope = 48.97903 to 26.93623 latitude; -67.6993 to -124.6325 longitude
| 座標（緯度経度） | 南 西 [26.936, -124.632], 北 東 [48.979, -67.699] |
|---|
生物分類学的範囲
127 different taxa of zooplankton: Acari Chaoborus Keratella ##[4] Bosmina Chaoborus punctipennis Cyclopidae ##[7] Diaptomidae Lecanidae Lepadella ##[10] Ploesoma Polyarthra Synchaeta ##[13] Trichocerca Diaphanosoma Daphnia ambigua ##[16] Temoridae Anuraeopsis Brachionus angularis ##[19] Conochilidae Hexarthra Kellicottia bostoniensis ##[22] Keratella taurocephala Platyias Pompholyx ##[25] Notommata Asplanchna Brachionus caudatus ##[28] Brachionus havanaensis Filinia Gastropus ##[31] None present Ceriodaphnia Chydoridae ##[34] Chironomidae Daphnia mendotae Kellicottia longispina ##[37] Daphnia Polyphemus Daphnia catawba ##[40] Sida Calanoida Chaoborus flavicans ##[43] Holopedium gibberum Collotheca Rotifera ##[46] Daphnia parvula Keratella hiemalis Leptodora ##[49] Moina Euchlanis Daphnia retrocurva ##[52] Eubosmina Dreissena bugensis Dreissena polymorpha ##[55] Testudinella Ergasilus Bdelloidea ##[58] Mytilina Brachionus calyciflorus Brachionus quadridentatus ##[61] Brachionus forficula Keratella testudo Hesperodiaptomus ##[64] Brachionus urceolaris Keratella quadrata Notholca ##[67] Daphnia lumholtzi Tylotrocha Chaoborus albipes ##[70] Centropagidae Cercopagis Unionicola ##[73] Holopedium amazonicum Brachionus bidentata Ascomorpha ##[76] Daphnia laevis Collothecidae Daphnia longiremis ##[79] Aglaodiaptomus Encentrum Colurella ##[82] Ceratopogonidae Brachionus Ptygura ##[85] Brachionus satanicus Brachionus budapestinensis Harpacticoida ##[88] Trichotria Keratella chussa Scapholeberis ##[91] Mysis relicta Wolga Chaoborus americanus ##[94] Lophocharis Simocephalus Proales ##[97] Kellicottia Keratella serrulata Copepoda ##[100] Latona Sinantherina Daphnia ctenodaphnia ##[103] Macrothricidae Brachionus zahniseri Cephalodella ##[106] Epiphanidae Monommata Epiphanes ##[109] Keratella ticinensis Keratella irregularis Daphnia dubia ##[112] Dreissena Brachionus leydigi Keratella valga ##[115] Limnias Wierzejskiella Artemia ##[118] Gammaridae Notommatidae Bythotrephes ##[121] Eurycercus Brachionus pterodinoides Brachionus falcatus ##[124] Resticula Bosminidae Coliothecidae ##[127] Bosminopsis
| Kingdom | animalia (Animals) |
|---|
時間的範囲
| 開始日 | 2007-01-01 |
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プロジェクトデータ
説明がありません
| タイトル | US Environmental Protection Agency's 2007 National Lake Assessment - zooplankton |
|---|---|
| ファンデイング | EPA |
| Study Area Description | NLA results are reported for the continental U.S. and for 9 ecological regions (ecoregions). Areas are included in an ecoregion based on similar landform and climate characteristics (see Chapter 6 and Figure 20). Assessments were conducted at the ecoregion level because the patterns of response to stress are often best understood in a regional context. Some states participating in the NLA assessed lake condition at an even finer state-scale resolution than the ecoregional scale by sampling additional random sites within their state boundaries. Although these data are included in the analysis described in this report, state-scale results are not presented. |
プロジェクトに携わる要員:
- Custodiansteward(保管者）
収集方法
In preparation for the survey, each target lake was screened to verify that it met the established criteria for inclusion in the survey. Throughout the summer of 2007, 86 field crews, consisting of 2 to 4 people each, sampled lakes from Maine to California. At each lake site, crews collected samples at a single station located at the deepest point in the lake and at ten stations around the lake perimeter (Figure 4). At the midlake station, depth profiles for temperature, pH, and dissolved oxygen were taken with a calibrated water quality probe meter or multi-probe sonde. A Secchi disk was used to measure water clarity and depth at which light penetrates the lake (the euphotic zone). NLA analysts used these vertical profile measurements to determine the extent of stratification and the availability of the appropriate temperature regime and level of available oxygen necessary to support aquatic life. Single grab water samples were collected to measure nutrients, chlorophyll-a, phytoplankton, and the algal toxin microcystin. Zooplankton samples were collected using a fine mesh (80µm) and course mesh (243µm) conical plankton net. A sediment core was taken to provide data on sediment diatoms and mercury levels. The top and bottom layers of the sediment core were analyzed to detect possible changes in diatom assemblages over a period of time.
| Study Extent | Initial discussion by states and EPA regarding the scope of the survey focused on the size of lakes that were to be considered in the target population. It was agreed that, to be included, the site had to be a natural or man-made freshwater lake, pond or reservoir, greater than 10 acres (4 hectares), at least 3.3 feet (1 meter) deep, and with a minimum of a quarter acre (0.1 hectare) open water. The Great Lakes and the Great Salt Lake were not included in the survey, nor were commercial treatment and/or disposal ponds, brackish lakes, or ephemeral lakes. After applying the criteria, 68,223 waterbodies were considered lakes by the NLA definition and thus comprised the target population. |
|---|---|
| Quality Control | To ensure consistency in data collection and quality assurance, the crews attended a three-day training session, used standardized field methods and data forms, and followed strict quality control protocols including field audits. |
Method step description:
- Since a census of every lake in the country is cost prohibitive and beyond the reach of any program, EPA used a statistical sampling approach incorporating state-ofthe-art survey design techniques. The first step, to ascertain the number of lakes in the country, was challenging because there is no comprehensive list or source for all lakes in the U.S. The best resource available is the USGS/EPA National Hydrography Dataset or NHD.
追加のメタデータ
| 目的 | The National Lakes Assessment (NLA) is a first-ever statistically-valid survey of the biological condition of lakes and reservoirs throughout the U.S. |
|---|---|
| 代替識別子 | 111105f7-661d-416e-bb9d-9e291d5fdb1f |
| https://bison.usgs.gov/ipt/resource?r=epa_nla_zooplankton |