Author: Jeff J. LaynePublisher:
ISBN:
Category : Giant kelp
Languages : en
Pages : 132
Book Description
The Biochemical Interaction Between the Giant Kelp Macrocystis Pyrifera and Its Bacterial Epiphytes
Author: Jeff J. LaynePublisher:
ISBN:
Category : Giant kelp
Languages : en
Pages : 132
Book Description
Consequences of Kelp Forest Structure and Dynamics for Epiphytes and Understory Communities
Author: Katherine Kimberlin ArkemaPublisher:
ISBN: 9780549841852
Category :
Languages : en
Pages : 294
Book Description
I investigated the relationship between giant kelp, Macrocystis pyrifera, a large and dynamic structure-forming organism on temperate reefs, and the species that live beneath its canopy and on its surfaces. In particular, my research focused on how the attenuating effect of kelp on light influences the structure and dynamics of the understory community, and how the dampening effect of kelp on currents influences spatial variation in the abundance and demography of a suspension-feeding epiphyte, the colonial and encrusting bryozoan, Membranipora serrilamella.
Oceanography and Marine Biology
Author: R. N. GibsonPublisher: CRC Press
ISBN: 142005094X
Category : Science
Languages : en
Pages : 566
Book Description
Reflecting the increasing interest in the field and its relevance in global environmental issues, Oceanography and Marine Biology: An Annual Review provides authoritative reviews that summarize results of recent research in basic areas of marine research, exploring topics of special and topical importance while adding to new areas as they arise. This volume, part of a series that regards the all marine sciences as a complete unit, features contributions from experts involved in biological, chemical, geological, and physical aspects of marine science. Including a full color insert and an extensive reference list, the text is an essential reference for researchers and students in all fields of marine science.
The Biology of Giant Kelp Beds (Macrocystis) in California
Author: Wheeler J. NorthPublisher:
ISBN:
Category : Science
Languages : en
Pages : 634
Book Description
Transcriptomic Profiling of the Giant Kelp, Macrocystis Pyrifera, Across Environmental Gradients
Author: Talina Helen KonotchickPublisher:
ISBN: 9781267301369
Category :
Languages : en
Pages : 201
Book Description
The giant kelp, Macrocystis pyrifera, spans gradients in light, temperature and nutrient availability both within its geographic distribution and the range of depths that individual sporophytes span. M. pyrifera is a member of the brown algae (Phaeophyceae), a complex multicellular group divergent from other eukaryotes; the application of sequence-based tools to study the ecology and evolution of this group is reviewed. To understand the biological response of this ecologically important alga to its environment, it is important to quantify the temporal scales of environmental variation. A several-year thermistor chain time series examined depth-specific variations in temperature and nutrients within a kelp bed. In addition to long-term seasonal changes, rapid vertical variations in the depth of the nutricline were observed, as much as 10m vertical displacement over the span of a few hours. Tools capable of examining the M. pyrifera physiological response on this temporal scale had not yet been developed. Due to the lack of available genomic data for the giant kelp, I utilized next-generation transcriptomic sequencing to increase the number of annotated transcriptional units for this species. M. pyrifera samples collected at different depths enabled transcriptomic exploration of metabolic function across environmental gradients. Depth-dependent transcription patterns were apparent and transcript annotation facilitated the identification of physiological responses to environmental factors. At the surface, where irradiance levels are highest and the potential for oxidative damage is most intense, physiological processes were focused on the capture of light energy for photosynthesis as well as protection from the damaging effects of the sun. M. pyrifera has multiple light harvesting complexes, including some in the LI818 group. Genes involved in nutrient acquisition, genetic information processing and degradation were more highly expressed at depth where colder temperatures and more nutrients occur. This dissertation provides the first transcriptomic characterization of M. pyrifera, develops sequenced-based tools and demonstrates their use to study transcriptional patterns in the context of this alga's natural and variable environment.
Some Aspects of the Biology of the Giant Kelp, Macrocystis Pyrifera, in the Falkland Islands
Author: B. I. Van TussenbroekA Study of the Complex Carbohydrates in Macrocystis Pyrifera(giant Kelp) ...
Author: Lloyd Linwood LiebEffects of the Epiphytic Bryozoan Membranipora Spp. on the Photosynthetic Performance and Growth of the Giant Kelp Macrocystis Pyrifera
Author: Brian Cohn (Graduate student)Publisher:
ISBN:
Category :
Languages : en
Pages : 37
Book Description
Giant kelps are among the most productive marine macrophytes and can alter surface water chemistry through photosynthesis and respiration. Along the California coast, Macrocystis pyrifera is the dominant kelp species and is commonly encrusted by the bryozoan Membranipora spp., which forms a crustose, opaque layer on kelp thalli. Reduction of primary production by this bryozoan could have implications for kelp growth and surface water chemistry via the production of oxygen and uptake of carbon within kelp forests. The effects of bryozoan encrustation on growth were measured in situ using a hole punch method. Effects on primary production were investigated by measuring dissolved oxygen production in situ and in the laboratory using sealed respirometry chambers that included artificial shading of blades to mimic bryozoan encrustation and measuring pigment concentration. Patterns of Membranipora spp. abundance and photosynthetic pigment concentration in kelp blades were also examined in a kelp forest in Santa Barbara, CA over the course of a year to understand potential impacts and patterns of Membranipora encrustation over longer periods. Growth surveys revealed that blade age, and not bryozoans, was the main factor affecting growth rates although encrusted blades showed a slightly greater decline in blade length. In lab experiments, O2 production rates of non-encrusted blades was up to 2 times greater than encrusted blades, while O2 consumption rates were up to 1.5 times greater for encrusted blades due to bryozoan respiration. Artificial shading of blades did not affect oxygen production rates, but encrusted blades showed decreased pigment concentrations at increasing levels of bryozoan encrustation. Relative abundances of Membranipora spp. were highest in the summer months, and decreased pigment concentrations were correlated with older blades and higher presence of Membranipora spp. These results suggest that bryozoan encrustation can significantly decrease primary productivity of M. pyrifera which may translate to reduced CO2 uptake. With the suggestion that kelp forests may serve to locally ameliorate against rising CO2 in surface waters and the widespread and increasing abundance of Membranipora spp. in some regions, bryozoan encrustation should be taken into consideration when evaluating the uptake potential of CO2 by giant kelp.
Symbiotic Relationships as Shapers of Biodiversity
Author: Carlos PradaPublisher: Frontiers Media SA
ISBN: 2889748650
Category : Science
Languages : en
Pages : 161
Book Description
In Situ Recruitment of Sporophytes of the Giant Kelp, Macrocystis Pyrifera
Author: Larry E. DeysherPublisher:
ISBN:
Category : Giant kelp
Languages : en
Pages : 96
Book Description