SBC LTER: Reef: Long-term experiment: Kelp removal: Understory kelp allometrics

These data consist of morphometric measurements of the understory
kelps Pterygophora californica and Laminaria farlowii used to estimate their
mass within permanent plots of a long-term experiment designed to
examine trajectories of change in the structure and productivity
of kelp forest communities in response to changes in the frequency
and severity of disturbance to giant kelp. The mass of individual P. californica is estimated from the number
of blades having a length > 30 cm, whereas the mass of L. farlowii is estimated from the length of
its single blade. Measurements are recorded for up to 30
individuals of each species within the 40 m x 2 m sampling area of
each plot. These data are combined with allometric relationships
established in the laboratory to provide non-destructive, in situ
estimates of the dry mass per unit area of bottom for each
species.

本数据集包含林下巨藻加州翅藻（Pterygophora californica）与法氏海带（Laminaria farlowii）的形态测量数据，用于在一项旨在探究巨藻森林群落结构与生产力随巨藻干扰频率及强度变化动态轨迹的长期定位实验的永久样地中，估算这两种藻类的生物量。加州翅藻的个体生物量通过长度大于30厘米的叶片数量估算，而法氏海带的个体生物量则通过其单叶的长度进行估算。每个样地的40 m × 2 m采样区域内，将为每个物种最多记录30个个体的测量数据。本数据集结合实验室建立的异速生长关系，可实现对每个物种底质单位面积干重的无损原位估算。