Physical disturbance by kelp abrades erect algae from the understorey

Physical disturbances in an Australian kelp

Physical disturbances leading to clearances of kelp canopies were investigated for their effects on understorey species. First, frequencies and types of natural dsturbances in a kelp forest were quanhf~ed from data on s t o m activity and undenvater surveys. Storms removed parts of kelp plants, whole plants and groups of plants. The latter led to cleanngs and Increased the quanhty of light reac...

Resource translocation drives δ(13) C fractionation during recovery from disturbance in giant kelp, Macrocystis pyrifera.

Resource allocation and translocation are fundamental physiological functions for autotrophs. The mobilization and use of resources drive population dynamics by regulating growth and recovery of individuals, but also influences ecosystem-level processes such as primary productivity and carbon cycling. This study provides the first observation of translocation-driven gradients of δ(13) C in macr...

Consequences of habitat disturbance and recovery to recruitment and the abundance of kelp forest fishes

Algae (Dasycladales) from the Upper Triassic Nayband Formation (northeast Iran)

Dasycladales are relatively abundant in the bedded limestones of the Bidestan and Howz-e Khan members of the Late Triassic Nayband Formation in central Iran. In a locality south of the town of Naybandan (northwest of Dig-e Rostam), several Rhaetian dasycladacean algae were found in thin sections. The following taxa are described: Diplopora phanerospora Pia, Naybandoporella rhaetica nov. gen. no...

Wave disturbance overwhelms top-down and bottom-up control of primary production in California kelp forests.

We took advantage of regional differences in environmental forcing and consumer abundance to examine the relative importance of nutrient availability (bottom-up), grazing pressure (top-down), and storm waves (disturbance) in determining the standing biomass and net primary production (NPP) of the giant kelp Macrocystis pyrifera in central and southern California. Using a nine-year data set coll...