A compilation of dietary and related data from the Southern Ocean

2018-08-10 - these data have been superseded by a new metadata record and dataset - see the provided URL for more details.

This record describes a compilation of trophic data from across the Southern Ocean. Data have been drawn from published literature, existing trophic data collections, AADC data sets, and unpublished collections. The database comprises two principal tables. The first table relates to direct sampling methods of dietary assessment, including gut, scat, and bolus content analyses, stomach flushing, and observed feeding. The second table is a compilation of stable isotope values. Each record in these two tables includes details such as the location and date of sampling, predator size and mass, prey size and mass, and estimates of dietary importance. Names have been validated against the World Register of Marine Species (http://www.marinespecies.org/).

The schemas of these tables are described below, and a list of the sources used to populate the tables is provided with the data.

A range of manual and automated checks were used to ensure that the entered data were as accurate as possible. These included visual checking of transcribed values, checking of row or column sums against known totals, and checking for values outside of allowed ranges. Suspicious entries were re-checked against original source. Apparent errors that could not be resolved were marked as such in the QUALITY_FLAG column, with the reason in the NOTES column.

Notes on names
'Sp.' indicates unidentified members of a genus (e.g. 'Pachyptila sp.'). For unidentified taxa at other taxonomic levels, the taxonomic name has been used (e.g. Amphipoda, Myctophidae, Decapoda). Uncertain species identifications (e.g. 'Notothenia rossii?' or 'Gymnoscopelus cf. piabilis') were assigned the genus name (e.g. 'Notothenia sp.'). Original names were retained in a separate column to allow future cross-checking. WoRMS identifiers (APHIA_ID numbers) were recorded with each matched taxon.

Grouped prey data in the diet sample table need to be handled with a bit of care. Papers commonly report prey statistics aggregated over groups of prey - e.g. one might give the diet composition by individual cephalopod prey species, and then an overall record for all cephalopod prey. The prey_is_aggregate column identifies such records. This allows us to differentiate grouped data like this from unidentified prey items from a certain prey group - for example, an unidentifiable cephalopod record would be entered as Cephalopoda (the scientific name), with 0 in the prey_is_aggregate column. A record that groups together a number of cephalopod records, possibly including some unidentifiable cephalopods, would also be entered as Cephalopoda, but with a 1 in the prey_is_aggregate column. See the notes on prey_is_aggregate, below.

Schema: Diet sample table

- LINK_ID: The unique identifier of this record
- SOURCE_ID: The reference number of the source of this data record. The list of references is provided with the database and also kept at: http://data.aad.gov.au/aadc/trophic/?tab=3
- LOCATION: The name of the location at which the data was collected.
- WEST: The westernmost longitude of the sampling region, in decimal degrees (negative values indicate western hemisphere longitudes)
- EAST: The easternmost longitude of the sampling region, in decimal degrees (negative values indicate western hemisphere longitudes)
- SOUTH: The southernmost latitude of the sampling region, in decimal degrees (negative values indicate southern hemisphere latitudes)
- NORTH: The northernmost latitude of the sampling region, in decimal degrees (negative values indicate southern hemisphere latitudes)
- OBSERVATION_DATE_START: The start of the sampling period (UTC)
- OBSERVATION_DATE_END: The end of the sampling period (UTC). If sampling was carried out over multiple seasons (e.g. during January of 2002 and January of 2003), these dates will indicate the first and last dates (as if the sampling was carried out from 1-Jan-2002 to 31-Jan-2003)
- ALTITUDE_MIN: The minimum altitude of the sampling region, in metres (if applicable)
- ALTITUDE_MAX: The maximum altitude of the sampling region, in metres (if applicable)
- DEPTH_MIN: The shallowest depth of the sampling, in metres (if applicable)
- DEPTH_MAX: The deepest depth of the sampling, in metres (if applicable)
- PREDATOR_NAME_ORIGINAL: The name of the predator, as it appeared in the original source
- PREDATOR_NAME: The scientific name of the predator (corrected, if necessary).
- PREDATOR_COMMON_NAME: The common name of the predator (from the WoRMS taxonomic register)
- PREDATOR_APHIA_ID: The numeric identifier of the predator in the WoRMS taxonomic register
- PREDATOR_LIFE_STAGE: Life stage of the predator. e.g. 'adult', 'chick', 'larva'. Values 'C1'-'C3' refer to calyptopis larval stages of euphausiids. 'F1'-'F6' refer to furcilia larval stages of euphausiids. 'N1'-'N6' refer to nauplius stages of crustaceans. 'Copepodite 1'-'Copepodite 6' refer to developmental stages of copepodites
- PREDATOR_BREEDING_STAGE: Stage of the breeding season of the predator, if applicable. e.g. 'brooding', 'chick rearing', 'nonbreeding', 'posthatching'
- PREDATOR_SEX: Sex of the predator. 'male', 'female', 'both', or 'unknown'
- PREDATOR_SAMPLE_COUNT: The number of predators for which data are given. If (say) 50 predators were caught but only 20 analysed, this column will contain 20.
- PREDATOR_TOTAL_COUNT: The total number of predators sampled. If (say) 50 predators were caught but only 20 analysed, this column will contain 50.
- PREDATOR_SAMPLE_COUNT: The identifier of this predator sample. PREDATOR_SAMPLE_ID values are unique within a source (i.e. - SOURCE_ID, PREDATOR_SAMPLE_ID pairs are globally unique). Rows with the same SOURCE_ID and PREDATOR_SAMPLE_ID values relate to the same predator individual or population, and so can be combined (e.g. for prey diversity analyses). Subsamples are indicated by a decimal number S.nnn, where S is the parent PREDATOR_SAMPLE_ID, and nnn (001-999) is the subsample number. Studies will often report detailed prey information for a large sample, and also report prey information for various subsamples of that sample (e.g. broken down by predator sex, or sampling season).
- PREDATOR_SIZE_MIN: The minimum size of the predators in the sample
- PREDATOR_SIZE_MAX: The maximum size of the predators in the sample
- PREDATOR_SIZE_MEAN: The mean size of the predators in the sample
- PREDATOR_SIZE_SD: The standard deviation of the size of the predators in the sample
- PREDATOR_SIZE_UNITS: The units of size. Current values 'mm', 'cm', 'm'
- PREDATOR_SIZE_NOTES: Notes on the predator size information, including a definition of what the size value represents (e.g. 'total length', 'standard length')
- PREDATOR_MASS_MIN: The minimum mass of the predators in the sample
- PREDATOR_MASS_MAX: The maximum mass of the predators in the sample
- PREDATOR_MASS_MEAN: The mean mass of the predators in the sample
- PREDATOR_MASS_SD: The standard deviation of the mass of the predators in the sample
- PREDATOR_MASS_UNITS: The units of mass (e.g. 'g' or 'kg')
- PREDATOR_MASS_NOTES: Notes on the predator mass information, including a definition of what the mass value represents (blank implies total body weight). Current values 'g', 'kg', 't'
- PREY_NAME_ORIGINAL: The name of the prey item, as it appeared in the original source.
- PREY_NAME: The scientific name of the prey item (corrected, if necessary).
- PREY_COMMON_NAME: The common name of the prey item (from the WoRMS taxonomic register)
- PREY_APHIA_ID: The numeric identifier of the prey in the WoRMS taxonomic register
- PREY_IS_AGGREGATE: 'Y' indicates that this row is an aggregation of other rows in this data source. For example, a study might give a number of individual squid species records, and then an overall squid record that encompasses the individual records. Use the PREY_IS_AGGREGATE information to avoid double-counting during analyses. If there no entry in this column, it means that this information is not included anywhere else in the database and can be used freely when aggregating over taxonomic groups, for example
- PREY_LIFE_STAGE: Life stage of the prey. e.g. 'adult', 'chick', 'larva'
- PREY_SAMPLE_COUNT: The number of prey individuals from which size and mass measurements were made (note: NOT the total number of individuals of this prey type, unless all individuals in the sample were measured)
- PREY_SIZE_MIN: The minimum size of the prey in the sample
- PREY_SIZE_MAX: The maximum size of the prey in the sample
- PREY_SIZE_MEAN: The mean size of the prey in the sample
- PREY_SIZE_SD: The standard deviation of the size of the prey in the sample
- PREY_SIZE_UNITS: The units of size. Current values 'mm', 'cm', 'm'
- PREY_SIZE_NOTES: Notes on the prey size information, including a definition of what the size value represents (e.g. 'total length', 'standard length')
- PREY_MASS_MIN: The minimum mass of the prey in the sample
- PREY_MASS_MAX: The maximum mass of the prey in the sample
- PREY_MASS_MEAN: The mean mass of the prey in the sample
- PREY_MASS_SD: The standard deviation of the mass of the prey in the sample
- PREY_MASS_UNITS: The units of mass. Current values 'mg', 'g', 'kg'
- PREY_MASS_NOTES: Notes on the prey mass information, including a definition of what the mass value represents (blank implies total body weight)
- FRACTION_DIET_BY_WEIGHT: The fraction (by weight) of the predator diet that this prey type made up (e.g. if Euphausia superba contributed 50% of the total mass of prey items, this value would be 0.5). Many papers represent very small dietary contributions as 'trace' or sometimes 'less than 0.1%'. These have been entered as -999
- FRACTION_DIET_BY_PREY_ITEMS: The fraction (by number) of prey items that this prey type made up (e.g. if 1000 Euphausia superba were found out of a total of 2000 prey items, this value would be 0.5). Note: many papers represent very small dietary contributions as 'trace' or sometimes 'less than 0.1%'. These have been entered as -999
- FRACTION_OCCURRENCE: The number of times this prey item occurred in a predator sample, as a fraction of the number of non-empty samples (e.g. if Euphausia superba occurred in half of the non-empty stomachs examined, this value would be 0.5). Empty stomachs are ignored for the purposes of calculating fraction of occurrence. For gut content analyses (and any other study types where 'no prey' can occur in a sample), the fraction of empty stomachs is also given (using prey_name 'None' - e.g. if predator_total_count was 10 and 3 stomachs were empty, this will be 0.3). Note: many papers represent very small dietary contributions as 'trace' or sometimes 'less than 0.1%'. These have been entered as -999
- QUALITATIVE_DIETARY_IMPORTANCE: Qualitative description of the dietary importance of this prey item (e.g. from comments about certain prey in the discussion text of an article), if numeric values have not been given. Current values are 'none', 'incidental', 'minor', 'major', 'almost exclusive', 'exclusive'
- CONSUMPTION_RATE_MIN: The minimum consumption rate of this prey item
- CONSUMPTION_RATE_MAX: The maximum consumption rate of this prey item
- CONSUMPTION_RATE_MEAN: The mean consumption rate of this prey item
- CONSUMPTION_RATE_SD: The standard deviation of the consumption rate of this prey item
- CONSUMPTION_RATE_UNITS: The units of consumption rate (e.g. 'kg/day')
- CONSUMPTION_RATE_NOTES: Notes about the consumption rate estimates
- IDENTIFICATION_METHOD: How this dietary information was gathered. Multiple values can potentially be entered (separated by commas). Current values include 'scat content' (contents of scats), 'stomach flushing' (physical sampling of the stomach contents by flushing the contents out with water), 'stomach content' (physical sampling of the stomach contents from a dead animal), 'regurgitate content' (physical sampling of the contents of forced or spontaneous regurgitations), 'observed predation', 'bolus content' (physical sampling of the contents of boluses), 'nest detritus', 'unknown'
- QUALITY_FLAG: An indicator of the quality of this record. 'Q' indicates that the data are known to be questionable for some reason. The reason should be in the notes column. 'G' indicates good data
- IS_SECONDARY_DATA: An indicator of whether this record was entered from its primary source, or from a secondary citation. 'Y' here indicates that the data actually came from another paper and were being reported in this paper as secondary data. Secondary data records are likely to be removed at a later date and replaced with information from the original source.
- NOTES: Any other notes
- LAST_MODIFIED: The date of last modification of this record

Schema: Isotope data table

- RECORD_ID: The unique identifier of this record
- SOURCE_ID: The reference number of the source of this data record. The list of references is provided with the database and also kept at: http://data.aad.gov.au/aadc/trophic/?tab=3
- LOCATION: The name of the location at which the data was collected.
- WEST: The westernmost longitude of the sampling region, in decimal degrees (negative values indicate western hemisphere longitudes)
- EAST: The easternmost longitude of the sampling region, in decimal degrees (negative values indicate western hemisphere longitudes)
- SOUTH: The southernmost latitude of the sampling region, in decimal degrees (negative values indicate southern hemisphere latitudes)
- NORTH: The northernmost latitude of the sampling region, in decimal degrees (negative values indicate southern hemisphere latitudes)
- OBSERVATION_DATE_START: The start of the sampling period (UTC)
- OBSERVATION_DATE_END: The end of the sampling period (UTC). If sampling was carried out over multiple seasons (e.g. during January of 2002 and January of 2003), these dates will indicate the first and last dates (as if the sampling was carried out from 1-Jan-2002 to 31-Jan-2003)
- ALTITUDE_MIN: The minimum altitude of the sampling region, in metres (if applicable)
- ALTITUDE_MAX: The maximum altitude of the sampling region, in metres (if applicable)
- DEPTH_MIN: The shallowest depth of the sampling, in metres (if applicable)
- DEPTH_MAX: The deepest depth of the sampling, in metres (if applicable)
- TAXON_NAME_ORIGINAL: The name of the taxon, as it appeared in the original source.
- TAXON_NAME: The scientific name of the taxon (corrected, if necessary).
- TAXON_COMMON_NAME: The common name of the taxon (from the WoRMS taxonomic register)
- TAXON_APHIA_ID: The numeric identifier of the taxon in the WoRMS taxonomic register
- TAXON_LIFE_STAGE: Life stage of the taxon. e.g. 'adult', 'chick', 'larva'. Values 'C1'-'C3' refer to calyptopis larval stages of euphausiids. 'F1'-'F6' refer to furcilia larval stages of euphausiids. 'N1'-'N6' refer to nauplius stages of crustaceans. 'Copepodite 1'-'Copepodite 6' refer to developmental stages of copepodites
- TAXON_BREEDING_STAGE: Stage of the breeding season of the taxon, if applicable. e.g. 'lactating', 'weaning', 'chick rearing'
- TAXON_SEX: Sex of the taxon. 'male', 'female', 'both', or 'unknown'
- TAXON_SAMPLE_COUNT: The number of samples from which size and stable isotope measurements were made
- TAXON_SIZE_MIN: The minimum size of the individuals in the sample
- TAXON_SIZE_MAX: The maximum size of the individuals in the sample
- TAXON_SIZE_MEAN: The mean size of the individuals in the sample
- TAXON_SIZE_SD: The standard deviation of the size of the individuals in the sample
- TAXON_SIZE_UNITS: The units of size. Current values 'mm', 'm'
- TAXON_SIZE_NOTES: Notes on the size information, including a definition of what the size value represents (e.g. 'total length', 'standard length')
- TAXON_MASS_MIN: The minimum mass of the individuals in the sample
- TAXON_MASS_MAX: The maximum mass of the individuals in the sample
- TAXON_MASS_MEAN: The mean mass of the individuals in the sample
- TAXON_MASS_SD: The standard deviation of the mass of the individuals in the sample
- TAXON_MASS_UNITS: The units of mass. e.g. 'g', 'kg'
- TAXON_MASS_NOTES: Notes on the taxon mass information, including a definition of what the mass value represents (blank implies total body weight)
- DELTA_13C_MEAN: The mean of the d13C values from the sample (permil;)
- DELTA_13C_VARIABILITY_VALUE: The variability of the d13C values from the sample
- DELTA_13C_VARIABILITY_TYPE: The variability type that the DELTA_13C_VARIABILITY_VALUE represents (currently 'SD' standard deviation, or 'SE' standard error)
- DELTA_15N_MEAN: The mean of the d15N values from the sample (permil;)
- DELTA_15N_VARIABILITY_VALUE: The variability of the d15N values from the sample
- DELTA_15N_VARIABILITY_TYPE: The variability type that the DELTA_15N_VARIABILITY_VALUE represents (currently 'SD' standard deviation, or 'SE' standard error)
- C_N_RATIO_MEAN: The mean of the C:N ratio values from the sample, expressed as a molar percentage
- C_N_RATIO_VARIABILITY_VALUE: The variability of the C:N ratio values from the sample
- C_N_RATIO_VARIABILITY_TYPE: The variability type that the C_N_RATIO_VARIABILITY_VALUE represents (currently 'SD' standard deviation, or 'SE' standard error)
- ISOTOPES_CARBONATES_EXTRACTED: Were carbonates extracted from the samples prior to isotope analyses? 'Y', 'N', or 'U' (unknown)
- ISOTOPES_LIPIDS_EXTRACTED: Were lipids extracted from the samples prior to isotope analyses? 'Y', 'N', or 'U' (unknown)
- ISOTOPES_BODY_PART_USED: Which part of the organism was sampled?
- QUALITY_FLAG: An indicator of the quality of this record. 'Q' indicates that the data are known to be questionable for some reason. The reason should be in the notes column. 'G' indicates good data
- IS_SECONDARY_DATA: An indicator of whether this record was entered from its primary source, or from a secondary citation. 'Y' here indicates that the data actually came from another paper and were being reported in this paper as secondary data. Secondary data records are likely to be removed at a later date and replaced with information from the original source.
- NOTES: Any other notes
- LAST_MODIFIED: The date of last modification of this record

2018年8月10日——本数据集已被新的元数据记录及数据集取代，请访问提供的URL以获取更多详情。

本记录描述了南大洋全域营养数据（trophic data）的汇编。数据来源于已发表文献、现有营养数据集、AADC数据集及未发表的数据集。该数据库包含两个主要表格：第一个表格涉及膳食评估（dietary assessment）的直接采样方法，包括肠道、粪便及食团内容物分析、胃冲洗法和观察性摄食记录；第二个表格为稳定同位素值（stable isotope values）的汇编。两个表格中的每条记录均包含采样地点、日期、捕食者大小与质量、猎物大小与质量及膳食重要性估计等详细信息。物种名称已通过世界海洋物种登记册（World Register of Marine Species，WoRMS，网址：http://www.marinespecies.org/）验证。

以下将描述表格的 schema，数据填充所用的来源列表随数据集提供。

研究人员采用了一系列手动及自动化检查以确保输入数据尽可能准确，包括转录值的视觉检查、行/列总和与已知总量的核对、允许范围外值的筛查。可疑条目已与原始来源重新核对，无法解决的明显错误将在QUALITY_FLAG列标记，并在NOTES列注明原因。

名称注释：
'Sp.'代表某属中未鉴定的物种（例如'Pachyptila sp.'）；对于其他分类层级未鉴定的类群，则使用其分类名称（例如Amphipoda、Myctophidae、Decapoda）；不确定的物种鉴定结果（例如'Notothenia rossii?'或'Gymnoscopelus cf. piabilis'）将被赋予属名（例如'Notothenia sp.'）。原始名称保留在单独列中以便未来交叉核对，每个匹配类群均记录有WoRMS标识符（APHIA_ID编号）。

膳食样本表中的聚合猎物数据需谨慎处理：文献通常报告跨猎物组聚合的统计数据——例如，先给出各头足类猎物物种的膳食组成，再给出所有头足类猎物的总体记录。prey_is_aggregate列用于标识此类记录，可区分聚合数据与某猎物组中未鉴定的猎物条目：例如，无法鉴定的头足类记录将以Cephalopoda（学名）录入，prey_is_aggregate列值为0；而聚合多个头足类记录（可能包含未鉴定物种）的条目同样以Cephalopoda录入，但prey_is_aggregate列值为1。详见下文prey_is_aggregate注释。

Schema：膳食样本表

- LINK_ID：本记录的唯一标识符
- SOURCE_ID：数据记录的来源参考编号。参考文献列表随数据库提供，亦可通过以下网址获取：http://data.aad.gov.au/aadc/trophic/?tab=3
- LOCATION：采样地点名称
- WEST：采样区域最西端经度（十进制度，负值表示西半球）
- EAST：采样区域最东端经度（十进制度，负值表示西半球）
- SOUTH：采样区域最南端纬度（十进制度，负值表示南半球）
- NORTH：采样区域最北端纬度（十进制度，负值表示南半球）
- OBSERVATION_DATE_START：采样周期开始时间（UTC）
- OBSERVATION_DATE_END：采样周期结束时间（UTC）。若采样跨多个季节（例如2002年1月及2003年1月），则记录首次与末次日期（视为2002年1月1日至2003年1月31日）
- ALTITUDE_MIN：采样区域最低海拔（米，如适用）
- ALTITUDE_MAX：采样区域最高海拔（米，如适用）
- DEPTH_MIN：采样最浅深度（米，如适用）
- DEPTH_MAX：采样最深深度（米，如适用）
- PREDATOR_NAME_ORIGINAL：原始来源中的捕食者名称
- PREDATOR_NAME：捕食者的学名（必要时已修正）
- PREDATOR_COMMON_NAME：捕食者的俗名（来自WoRMS分类登记册）
- PREDATOR_APHIA_ID：捕食者在WoRMS分类登记册中的数字标识符
- PREDATOR_LIFE_STAGE：捕食者的生活史阶段，例如'adult'（成体）、'chick'（幼雏）、'larva'（幼虫）。C1-C3表示磷虾的无节幼体阶段；F1-F6表示磷虾的糠虾幼体阶段；N1-N6表示甲壳类的无节幼虫阶段；Copepodite 1-Copepodite 6表示桡足类的桡足幼体发育阶段
- PREDATOR_BREEDING_STAGE：捕食者繁殖季节阶段（如适用），例如'brooding'（抱卵）、'chick rearing'（育雏）、'nonbreeding'（非繁殖期）、'posthatching'（孵化后）
- PREDATOR_SEX：捕食者性别，取值为'male'（雄性）、'female'（雌性）、'both'（雌雄均有）或'unknown'（未知）
- PREDATOR_SAMPLE_COUNT：提供数据的捕食者数量。例如，若捕获50只捕食者但仅分析20只，则该列值为20
- PREDATOR_TOTAL_COUNT：采样的捕食者总数。例如，若捕获50只捕食者但仅分析20只，则该列值为50
- PREDATOR_SAMPLE_ID：捕食者样本的标识符。PREDATOR_SAMPLE_ID在同一来源内唯一（即SOURCE_ID与PREDATOR_SAMPLE_ID组合全局唯一）。相同SOURCE_ID与PREDATOR_SAMPLE_ID的行对应同一捕食者个体或种群，可合并用于猎物多样性分析。子样本以十进制数S.nnn表示（S为父样本PREDATOR_SAMPLE_ID，nnn为001-999的子样本编号）。研究常报告大样本的详细猎物信息及各子样本数据（例如按捕食者性别或采样季节拆分）
- PREDATOR_SIZE_MIN：样本中捕食者的最小大小
- PREDATOR_SIZE_MAX：样本中捕食者的最大大小
- PREDATOR_SIZE_MEAN：样本中捕食者的平均大小
- PREDATOR_SIZE_SD：样本中捕食者大小的标准差
- PREDATOR_SIZE_UNITS：大小单位，当前取值为'mm'、'cm'、'm'
- PREDATOR_SIZE_NOTES：捕食者大小信息注释，包括大小指标定义（例如'total length'总长度、'standard length'标准长度）
- PREDATOR_MASS_MIN：样本中捕食者的最小质量
- PREDATOR_MASS_MAX：样本中捕食者的最大质量
- PREDATOR_MASS_MEAN：样本中捕食者的平均质量
- PREDATOR_MASS_SD：样本中捕食者质量的标准差
- PREDATOR_MASS_UNITS：质量单位，例如'g'或'kg'
- PREDATOR_MASS_NOTES：捕食者质量信息注释，包括质量指标定义（空白表示总体重），当前取值为'g'、'kg'、't'
- PREY_NAME_ORIGINAL：原始来源中的猎物名称
- PREY_NAME：猎物的学名（必要时已修正）
- PREY_COMMON_NAME：猎物的俗名（来自WoRMS分类登记册）
- PREY_APHIA_ID：猎物在WoRMS分类登记册中的数字标识符
- PREY_IS_AGGREGATE：'Y'表示该行是本数据源内其他行的聚合记录。例如，研究可能给出多个鱿鱼物种的记录，再给出所有鱿鱼的总体记录。使用该字段可避免分析时重复计数。若该列无值，则表示此信息未在数据库其他位置存在，可自由用于分类组聚合
- PREY_LIFE_STAGE：猎物的生活史阶段，例如'adult'、'chick'、'larva'
- PREY_SAMPLE_COUNT：测量大小与质量的猎物个体数量（注意：非该猎物类型的总个体数，除非样本中所有个体均被测量）
- PREY_SIZE_MIN：样本中猎物的最小大小
- PREY_SIZE_MAX：样本中猎物的最大大小
- PREY_SIZE_MEAN：样本中猎物的平均大小
- PREY_SIZE_SD：样本中猎物大小的标准差
- PREY_SIZE_UNITS：大小单位，当前取值为'mm'、'cm'、'm'
- PREY_SIZE_NOTES：猎物大小信息注释，包括大小指标定义（例如'total length'、'standard length'）
- PREY_MASS_MIN：样本中猎物的最小质量
- PREY_MASS_MAX：样本中猎物的最大质量
- PREY_MASS_MEAN：样本中猎物的平均质量
- PREY_MASS_SD：样本中猎物质量的标准差
- PREY_MASS_UNITS：质量单位，当前取值为'mg'、'g'、'kg'
- PREY_MASS_NOTES：猎物质量信息注释，包括质量指标定义（空白表示总体重）
- FRACTION_DIET_BY_WEIGHT：该猎物类型在捕食者膳食中的重量占比（例如，若南极磷虾Euphausia superba占猎物总质量的50%，则值为0.5）。许多文献将极少量贡献标注为'trace'或'less than 0.1%'，此类数据统一记为-999
- FRACTION_DIET_BY_PREY_ITEMS：该猎物类型在猎物条目中的数量占比（例如，若2000个猎物条目中有1000个南极磷虾，则值为0.5）。注意：极少量贡献记为-999
- FRACTION_OCCURRENCE：该猎物条目在捕食者样本中出现的次数占非空样本数的比例（例如，若南极磷虾出现在一半的非空胃样本中，则值为0.5）。计算时忽略空胃样本。对于肠道内容物分析（及其他可能出现'无猎物'样本的研究类型），空胃比例将以prey_name='None'录入（例如，若predator_total_count=10且3个胃为空，则值为0.3）。注意：极少量贡献记为-999
- QUALITATIVE_DIETARY_IMPORTANCE：该猎物类型膳食重要性的定性描述（例如来自文献讨论部分的评论），若无数值则填写。当前取值为'none'（无）、'incidental'（偶然）、'minor'（次要）、'major'（主要）、'almost exclusive'（近乎唯一）、'exclusive'（唯一）
- CONSUMPTION_RATE_MIN：该猎物类型的最小消费率
- CONSUMPTION_RATE_MAX：该猎物类型的最大消费率
- CONSUMPTION_RATE_MEAN：该猎物类型的平均消费率
- CONSUMPTION_RATE_SD：该猎物类型消费率的标准差
- CONSUMPTION_RATE_UNITS：消费率单位，例如'kg/day'
- CONSUMPTION_RATE_NOTES：消费率估计值注释
- IDENTIFICATION_METHOD：膳食信息的采集方法，可输入多个值（逗号分隔）。当前取值包括'scat content'（粪便内容物）、'stomach flushing'（胃冲洗法）、'stomach content'（死体胃内容物）、'regurgitate content'（呕吐物内容物）、'observed predation'（观察性捕食）、'bolus content'（食团内容物）、'nest detritus'（巢碎屑）、'unknown'（未知）
- QUALITY_FLAG：记录质量指标。'Q'表示数据存在已知问题（原因见NOTES列）；'G'表示数据质量良好
- IS_SECONDARY_DATA：记录是否来自二级引用。'Y'表示数据实际来自其他文献并在此文献中二次报告，此类记录可能后续被移除并替换为原始来源数据
- NOTES：其他注释
- LAST_MODIFIED：记录最后修改日期

Schema：同位素数据表

- RECORD_ID：本记录的唯一标识符
- SOURCE_ID：数据记录的来源参考编号。参考文献列表随数据库提供，亦可通过以下网址获取：http://data.aad.gov.au/aadc/trophic/?tab=3
- LOCATION：采样地点名称
- WEST：采样区域最西端经度（十进制度，负值表示西半球）
- EAST：采样区域最东端经度（十进制度，负值表示西半球）
- SOUTH：采样区域最南端纬度（十进制度，负值表示南半球）
- NORTH：采样区域最北端纬度（十进制度，负值表示南半球）
- OBSERVATION_DATE_START：采样周期开始时间（UTC）
- OBSERVATION_DATE_END：采样周期结束时间（UTC）。若采样跨多个季节，则记录首次与末次日期
- ALTITUDE_MIN：采样区域最低海拔（米，如适用）
- ALTITUDE_MAX：采样区域最高海拔（米，如适用）
- DEPTH_MIN：采样最浅深度（米，如适用）
- DEPTH_MAX：采样最深深度（米，如适用）
- TAXON_NAME_ORIGINAL：原始来源中的类群名称
- TAXON_NAME：类群的学名（必要时已修正）
- TAXON_COMMON_NAME：类群的俗名（来自WoRMS分类登记册）
- TAXON_APHIA_ID：类群在WoRMS分类登记册中的数字标识符
- TAXON_LIFE_STAGE：类群的生活史阶段，例如'adult'、'chick'、'larva'。C1-C3表示磷虾无节幼体阶段；F1-F6表示磷虾糠虾幼体阶段；N1-N6表示甲壳类无节幼虫阶段；Copepodite1-Copepodite6表示桡足类桡足幼体阶段
- TAXON_BREEDING_STAGE：类群繁殖季节阶段（如适用），例如'lactating'（泌乳）、'weaning'（断奶）、'chick rearing'（育雏）
- TAXON_SEX：类群性别，取值为'male'、'female'、'both'或'unknown'
- TAXON_SAMPLE_COUNT：进行大小与稳定同位素测量的样本数量
- TAXON_SIZE_MIN：样本中个体的最小大小
- TAXON_SIZE_MAX：样本中个体的最大大小
- TAXON_SIZE_MEAN：样本中个体的平均大小
- TAXON_SIZE_SD：样本中个体大小的标准差
- TAXON_SIZE_UNITS：大小单位，当前取值为'mm'、'm'
- TAXON_SIZE_NOTES：大小信息注释，包括大小指标定义（例如'total length'、'standard length'）
- TAXON_MASS_MIN：样本中个体的最小质量
- TAXON_MASS_MAX：样本中个体的最大质量
- TAXON_MASS_MEAN：样本中个体的平均质量
- TAXON_MASS_SD：样本中个体质量的标准差
- TAXON_MASS_UNITS：质量单位，例如'g'、'kg'
- TAXON_MASS_NOTES：类群质量信息注释，包括质量指标定义（空白表示总体重）
- DELTA_13C_MEAN：样本中δ¹³C值的平均值（千分比）
- DELTA_13C_VARIABILITY_VALUE：样本中δ¹³C值的变异性
- DELTA_13C_VARIABILITY_TYPE：DELTA_13C_VARIABILITY_VALUE代表的变异性类型（当前为'SD'标准差或'SE'标准误）
- DELTA_15N_MEAN：样本中δ¹⁵N值的平均值（千分比）
- DELTA_15N_VARIABILITY_VALUE：样本中δ¹⁵N值的变异性
- DELTA_15N_VARIABILITY_TYPE：DELTA_15N_VARIABILITY_VALUE代表的变异性类型（当前为'SD'或'SE'）
- C_N_RATIO_MEAN：样本中碳氮比的平均值（摩尔百分比）
- C_N_RATIO_VARIABILITY_VALUE：样本中碳氮比的变异性
- C_N_RATIO_VARIABILITY_TYPE：C_N_RATIO_VARIABILITY_VALUE代表的变异性类型（当前为'SD'或'SE'）
- ISOTOPES_CARBONATES_EXTRACTED：同位素分析前是否提取样本中的碳酸盐？取值为'Y'（是）、'N'（否）或'U'（未知）
- ISOTOPES_LIPIDS_EXTRACTED：同位素分析前是否提取样本中的脂质？取值为'Y'、'N'或'U'
- ISOTOPES_BODY_PART_USED：采样的生物体部位
- QUALITY_FLAG：记录质量指标。'Q'表示数据存在已知问题（原因见NOTES列）；'G'表示数据质量良好
- IS_SECONDARY_DATA：记录是否来自二级引用。'Y'表示数据实际来自其他文献并在此文献中二次报告，此类记录可能后续被移除并替换为原始来源数据
- NOTES：其他注释
- LAST_MODIFIED：记录最后修改日期