species.richness.nonweighted(sperich)
species.richness.nonweighted()所属R语言包:sperich
Species richness estimation without weighting
物种丰富度较低的情况下,权重
译者:生物统计家园网 机器人LoveR
描述----------Description----------
This function estimates the species richness for a given distance based on given species occurences without using weighting factor.
这个函数估计的物种丰富度,根据给定的物种出现次数不使用权重因子给定的距离。
用法----------Usage----------
distance=10, dimension, shift, resolution=1,
upperbound, narrow.endemic=FALSE, narrow.endemic.limit=5,
参数----------Arguments----------
参数:dataset.all.species
A dataset containing the species with their ID (named: speciesID)and the longitude (named: long) and latitude (named: lat) of their occurence location.
数据集包含的物种他们的ID(名为:speciesID)的,其发生“位置的经度(命名为:长)和纬度(名为:纬度)。
参数:landwatermask
A grid containing the land-water-information of the observed area. If a grid cell containes no land, the value of the cell in the landwatermask is -1, otherwise it is 0. Additional, height-informations could be added for land surfaces. In this case, take care of the 'upperbound' value.
的网格中所观察到的区域的土地与水的信息。一个的网格单元containes没有土地如果的landwatermask的单元格中的值是-1,否则为0。另外,土地表面高度的信息可以被添加。在这种情况下,照顾的“上界”的价值。
参数:distance
The distance which will be used for species range estimation.
将用于物种范围估计的距离。
参数:dimension
The dimension of the processed grid.
处理后的网格尺寸。
参数:shift
The geographic coordinates of the origin of the grid.
GEO坐标的网格原点。
参数:resolution
The resolution of the grid in (geographical) degree.
决议中的网格(区域)学位。
参数:upperbound
This value determines the height (based on values in 'landwatermask') which is considered to be a barrier for species distribution.
此值确定的高度(基于价值观在“landwatermask”),这被认为是物种分布的障碍。
参数:narrow.endemic
A boolean flag that determines if only narrow endemic species should be considered in species richness estimation.
一个布尔标志,用于确定如果只有狭窄的特有物种,应考虑物种丰富度估计。
参数:narrow.endemic.limit
This value determines the limit of points up to which a species is considered as narrow endemic species.
此值确定点的限制,一个物种被认为是狭隘的特有物种。
参数:all.species
The vector with the numbers of the species which should be mentioned. If the first value is -1, all species in the database will be used for species richness estimation.
的种类的数目,应提及的向量。如果第一个值是-1,将用于数据库中的所有物种,物种丰富度估计。
参数:silent
A boolean flag that determines wether the report of status messages should be suppressed or not.
一个布尔标志,用于确定羯羊报告应被抑制的状态消息。
Details
详细信息----------Details----------
This routine estimates the species richness for a given distance (without weighted summation) based on given species occurences through a geometric interpolation model (details in Raedig et al. 2010).
这个例程给定的距离(不加权求和)根据给定的物种出现次数(详情在Raedig等,2010)通过几何插值模型估计的物种丰富度。
值----------Value----------
This function returns a grid which contains the species richness information for a given distance.
这个函数返回一个网格,其中包含的物种丰富度的信息对于一个给定的距离。
(作者)----------Author(s)----------
Maximilian Lange, Sven Lautenbach
参考文献----------References----------
Reassessing Neotropical angiosperm distribution patterns based on monographic data: a geometric interpolation approach. Biodivers Conserv, 19, 1523-1546.
实例----------Examples----------
##load data[#加载数据]
data(dataset.all.species)
data(dataset.landwater)
##create grid parameters[#创建网格参数。]
dimension <- getDimension(dataset.all.species, resolution=1)
shift <- getShift(dataset.all.species)
##create landwatermask[#创建landwatermask]
landwatermask.nocoast <- createLandwatermask(dataset.landwater,
dimension, shift, resolution=1)
##estimate species richness[#估计物种丰富度]
species.richness.noweight <- species.richness.nonweighted(dataset.all.species,
landwatermask.nocoast, distance=10, dimension,
shift, resolution=1, upperbound=5, narrow.endemic=FALSE,
narrow.endemic.limit=5, all.species=1:20)
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
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