Algae & Marine Plants of Point Reyes
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Early Photosynthetic Eukaryotes Inhabited Low-Salinity Habitats
Early photosynthetic eukaryotes inhabited PNAS PLUS low-salinity habitats Patricia Sánchez-Baracaldoa,1, John A. Ravenb,c, Davide Pisanid,e, and Andrew H. Knollf aSchool of Geographical Sciences, University of Bristol, Bristol BS8 1SS, United Kingdom; bDivision of Plant Science, University of Dundee at the James Hutton Institute, Dundee DD2 5DA, United Kingdom; cPlant Functional Biology and Climate Change Cluster, University of Technology Sydney, Ultimo, NSW 2007, Australia; dSchool of Biological Sciences, University of Bristol, Bristol BS8 1TH, United Kingdom; eSchool of Earth Sciences, University of Bristol, Bristol BS8 1TH, United Kingdom; and fDepartment of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138 Edited by Peter R. Crane, Oak Spring Garden Foundation, Upperville, Virginia, and approved July 7, 2017 (received for review December 7, 2016) The early evolutionary history of the chloroplast lineage remains estimates for the origin of plastids ranging over 800 My (7). At the an open question. It is widely accepted that the endosymbiosis that same time, the ecological setting in which this endosymbiotic event established the chloroplast lineage in eukaryotes can be traced occurred has not been fully explored (8), partly because of phy- back to a single event, in which a cyanobacterium was incorpo- logenetic uncertainties and preservational biases of the fossil re- rated into a protistan host. It is still unclear, however, which cord. Phylogenomics and trait evolution analysis have pointed to a Cyanobacteria are most closely related to the chloroplast, when the freshwater origin for Cyanobacteria (9–11), providing an approach plastid lineage first evolved, and in what habitats this endosym- to address the early diversification of terrestrial biota for which the biotic event occurred. -
Habitat Matters for Inorganic Carbon Acquisition in 38 Species Of
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by University of Wisconsin-Milwaukee University of Wisconsin Milwaukee UWM Digital Commons Theses and Dissertations August 2013 Habitat Matters for Inorganic Carbon Acquisition in 38 Species of Red Macroalgae (Rhodophyta) from Puget Sound, Washington, USA Maurizio Murru University of Wisconsin-Milwaukee Follow this and additional works at: https://dc.uwm.edu/etd Part of the Ecology and Evolutionary Biology Commons Recommended Citation Murru, Maurizio, "Habitat Matters for Inorganic Carbon Acquisition in 38 Species of Red Macroalgae (Rhodophyta) from Puget Sound, Washington, USA" (2013). Theses and Dissertations. 259. https://dc.uwm.edu/etd/259 This Thesis is brought to you for free and open access by UWM Digital Commons. It has been accepted for inclusion in Theses and Dissertations by an authorized administrator of UWM Digital Commons. For more information, please contact [email protected]. HABITAT MATTERS FOR INORGANIC CARBON ACQUISITION IN 38 SPECIES OF RED MACROALGAE (RHODOPHYTA) FROM PUGET SOUND, WASHINGTON, USA1 by Maurizio Murru A Thesis Submitted in Partial Fulfillment of the Requirements for the Degree of Master of Science in Biological Sciences at The University of Wisconsin-Milwaukee August 2013 ABSTRACT HABITAT MATTERS FOR INORGANIC CARBON ACQUISITION IN 38 SPECIES OF RED MACROALGAE (RHODOPHYTA) FROM PUGET SOUND, WASHINGTON, USA1 by Maurizio Murru The University of Wisconsin-Milwaukee, 2013 Under the Supervision of Professor Craig D. Sandgren, and John A. Berges (Acting) The ability of macroalgae to photosynthetically raise the pH and deplete the inorganic carbon pool from the surrounding medium has been in the past correlated with habitat and growth conditions. -
Title the Intertidal Biota of Volcanic Yankich Island (Middle
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Kyoto University Research Information Repository The Intertidal Biota of Volcanic Yankich Island (Middle Kuril Title Islands) Author(s) Kussakin, Oleg G.; Kostina, Elena E. PUBLICATIONS OF THE SETO MARINE BIOLOGICAL Citation LABORATORY (1996), 37(3-6): 201-225 Issue Date 1996-12-25 URL http://hdl.handle.net/2433/176267 Right Type Departmental Bulletin Paper Textversion publisher Kyoto University Pub!. Seto Mar. Bioi. Lab., 37(3/6): 201-225, 1996 201 The Intertidal Biota of Volcanic Y ankich Island (Middle Kuril Islands) 0LEG G. KUSSAKIN and ELENA E. KOSTINA Institute of Marine Biology, Academy of Sciences of Russia, Vladivostok 690041, Russia Abstract A description of the intertidal biota of volcanic Yankich Island (Ushishir Islands, Kuril Islands) is given. The species composition and vertical distribution pattern of the intertidal communities at various localities are described in relation to environmental factors, such as nature of the substrate, surf conditions and volcanic vent water. The macrobenthos is poor in the areas directly influenced by high tempera ture (20-40°C) and high sulphur content. There are no marked changes in the intertidal communities in the areas of volcanic springs that are characterised by temperature below 10°C and by the absence of sulphur compounds. In general, the species composi tion and distribution of the intertidal biota are ordinary for the intertidal zone of the middle Kuril Islands. But there are departures from the typical zonation of the intertidal biota. Also, mass populations of Balanus crenatus appear. -
Fucus Vesiculosus Populations?
l MARINE ECOLOGY PROGRESS SERIES Vol. 133: 191-201.1996 Published March 28 1 Mar Ecol Prog Ser Are neighbours harmful or helpful in Fucus vesiculosus populations? Joel C. Creed*,T. A. Norton, Joanna M. Kain (Jones) Port Erin Marine Laboratory, Port Erin. Isle of Man IM9 6JA, United Kingdom ABSTRACT: In order to investigate the effect of density on Fucus vesjculosus L. at all stages of its development, 2 experiments were carried out. A culture study in the laboratory found that increased density resulted in depressed growth and a negatively skewed population structure during the first month in the lives of freshly settled germlings. Intraspecific competition acts even at this early stage, and the limiting factor was probably nutrients. 'Two-sided' ('resource depletion') competition and an early scramble phase of growth may explain negative skewness in plant sizes. On the shore experi- mental thinning by reduction of the canopy resulted in increased macrorecruitment (apparent density) from a bank of microscopic plants which must have been present for some time. With increased thinning more macrorecruits loined the remaining plants, making population size structures highly posit~velyskewed. Thinning had no effect on reproduction In terms of the portion of biomass as repro- ductive tissue. Manipulative weedlng allows an assessment of the potent~alspore bank in seasonally reproductive seaweeds and revealed that there are always replacement plants in reserve to compen- sate for canopy losses. In E vesiculosus the performance of individuals early on is crucial to their sub- sequent survival to reproductive stage, as neighbours are generally competitively harmful. However, a failure to 'win' early on may not necessarily result in the ending of a small plant's life - the 'seed' bank still offers the individual a slim chance of survival and protects the population from harmful stochastic events KEY WORDS: Culture . -
The Marine Life Information Network® for Britain and Ireland (Marlin)
The Marine Life Information Network® for Britain and Ireland (MarLIN) Description, temporal variation, sensitivity and monitoring of important marine biotopes in Wales. Volume 1. Background to biotope research. Report to Cyngor Cefn Gwlad Cymru / Countryside Council for Wales Contract no. FC 73-023-255G Dr Harvey Tyler-Walters, Charlotte Marshall, & Dr Keith Hiscock With contributions from: Georgina Budd, Jacqueline Hill, Will Rayment and Angus Jackson DRAFT / FINAL REPORT January 2005 Reference: Tyler-Walters, H., Marshall, C., Hiscock, K., Hill, J.M., Budd, G.C., Rayment, W.J. & Jackson, A., 2005. Description, temporal variation, sensitivity and monitoring of important marine biotopes in Wales. Report to Cyngor Cefn Gwlad Cymru / Countryside Council for Wales from the Marine Life Information Network (MarLIN). Marine Biological Association of the UK, Plymouth. [CCW Contract no. FC 73-023-255G] Description, sensitivity and monitoring of important Welsh biotopes Background 2 Description, sensitivity and monitoring of important Welsh biotopes Background The Marine Life Information Network® for Britain and Ireland (MarLIN) Description, temporal variation, sensitivity and monitoring of important marine biotopes in Wales. Contents Executive summary ............................................................................................................................................5 Crynodeb gweithredol ........................................................................................................................................6 -
The Moss-Back Alga (Cladophorophyceae, Chlorophyta) on Two Species of Freshwater Turtles in the Kimberleys
Telopea 12(2) 279–284 The moss-back alga (Cladophorophyceae, Chlorophyta) on two species of freshwater turtles in the Kimberleys Stephen Skinner1,2, Nancy FitzSimmons3 and Timothy J. Entwisle1 1National Herbarium of New South Wales, Mrs Macquaries Road, Sydney NSW 2000 Australia 2Southern ACT Catchment Group Inc., PO Box 2056, Kambah, ACT Author for correspondence: [email protected] 3Institute for Applied Ecology, School of Resource, Environmental & Heritage Sciences, University of Canberra, Canberra, ACT 2601, Australia Abstract The range of the Australian freshwater alga Basicladia ramulosa Ducker is extended, both in its turtle hosts (Chelodina burrungandjii Thomson et al.; Emydura australis (Grey)) and in geography, to tropical northern Western Australia. Along with further morphological observations, sporangia are described for the first time in this taxon. Introduction Moss-back turtles (Fig. 1) have fascinated biologists for many years. While the carapace of a potentially amphibious turtle would be a challenging habitat for most aquatic organisms, it is perhaps surprising there are only a handful of attached algae reported from such sites. Edgren et al. (1953) detailed the range of host turtles then known in North America and the range of epizoic algae that included Rhizoclonium and Cladophora. Two further genera in the Cladophoraceae are the only macroalgae widely reported on turtle carapaces: the prostrate, spreading, endozoic (and possibly disease causing) Dermatophyton radicans Peter, and species of the heterotrichous genus Basicladia, responsible for the name ‘moss-back’. In the United States, Basicladia is considered a small epizoic genus on turtles and water snails, of three to four taxa (John 2003). Hamilton (1948) described sexual reproduction in North American species of Basicladia involving the fusion of biflagellate zooids as is commonly the case in the Cladophoraceae. -
Processing of Allochthonous Macrophyte Subsidies by Sandy Beach Consumers: Estimates of Feeding Rates and Impacts on Food Resources
Mar Biol DOI 10.1007/s00227-008-0913-3 RESEARCH ARTICLE Processing of allochthonous macrophyte subsidies by sandy beach consumers: estimates of feeding rates and impacts on food resources Mariano Lastra · Henry M. Page · Jenifer E. Dugan · David M. Hubbard · Ivan F. Rodil Received: 29 January 2007 / Accepted: 8 January 2008 © Springer-Verlag 2008 Abstract Allochthonous subsidies of organic material impact on drift macrophyte processing and fate and that the can profoundly inXuence population and community struc- quantity and composition of drift macrophytes could, in ture; however, the role of consumers in the processing of turn, limit populations of beach consumers. these inputs is less understood but may be closely linked to community and ecosystem function. Inputs of drift macro- phytes subsidize sandy beach communities and food webs Introduction in many regions. We estimated feeding rates of dominant sandy beach consumers, the talitrid amphipods (Megalor- Allochthonous inputs of organic matter can strongly inXu- chestia corniculata, in southern California, USA, and Tali- ence population and community structure in many eco- trus saltator, in southern Galicia, Spain), and their impacts systems (e.g., Polis and Hurd 1996; Cross et al. 2006). on drift macrophyte subsidies in Weld and laboratory exper- Such eVects are expected to be greatest where a highly iments. Feeding rate varied with macrophyte type and, for productive system interfaces with and exports materials to T. saltator, air temperature. Size-speciWc feeding rates of a relatively less productive system (Barrett et al. 2005). talitrid amphipods were greatest on brown macroalgae Ecosystems that are subsidized by allochthonous inputs (Macrocystis, Egregia, Saccorhiza and Fucus). -
Getative Tissues; the GDBH Predicts Metabolic Costs Associated with Them
J. Phycol. 35, 483±492 (1999) PHLOROTANNIN ALLOCATION AMONG TISSUES OF NORTHEASTERN PACIFIC KELPS AND ROCKWEEDS1 Kathryn L. Van Alstyne2 Department of Zoology, Oregon State University, Corvallis, Oregon 97331 James J. McCarthy III, Cynthia L. Hustead, and Laura J. Kearns Department of Biology, Kenyon College, Gambier, Ohio 43022 Optimal defense theory (ODT) predicts antiher- Abbreviations: DM, dry mass; GDBH, growth±dif- bivore defensive compounds will be allocated so ferentiation balance hypothesis; ODT, optimal de- that the most valuable or most susceptible tissues fense theory will be best defended. The growth±differentiation balance hypothesis (GDBH) predicts that defense al- location will be a result of trade-offs between growth Plants allocate materials and energy among criti- and defense. Thus, these two theories predict op- cal functions such as maintenance, growth, repro- posite allocation patterns with respect to ``valuable,'' duction, and defense (Bazazz and Grace 1997 and actively growing meristematic and reproductive tis- citations therein). It is widely assumed the total sues. ODT predicts that meristems and reproductive amount of resources available for these functions is tissues should have higher defense levels than non- limited and all of these functions have signi®cant meristematic vegetative tissues; the GDBH predicts metabolic costs associated with them. Consequently, the defense levels of meristems and reproductive over evolutionary time there should be selection for tissues will be lower than vegetative tissues. We ex- individuals to distribute resources among functions amined allocation patterns of phlorotannins in 21 in ways that maximize overall ®tness, assuming that species of kelps (Order Laminariales) and rock- allocation strategies are not limited by physiological weeds (Order Fucales) from nine sites on the west or other constraints. -
The Unicellular and Colonial Organisms Prokaryotic And
The Unicellular and Colonial Organisms Prokaryotic and Eukaryotic Cells As you know, the building blocks of life are cells. Prokaryotic cells are those cells that do NOT have a nucleus. They mostly include bacteria and archaea. These cells do not have membrane-bound organelles. Eukaryotic cells are those that have a true nucleus. That would include plant, animal, algae, and fungal cells. As you can see, to the left, eukaryotic cells are typically larger than prokaryotic cells. Today in lab, we will look at examples of both prokaryotic and eukaryotic unicellular organisms that are commonly found in pond water. When examining pond water under a microscope… The unpigmented, moving microbes will usually be protozoans. Greenish or golden-brown organisms will typically be algae. Microorganisms that are blue-green will be cyanobacteria. As you can see below, living things are divided into 3 domains based upon shared characteristics. Domain Eukarya is further divided into 4 Kingdoms. Domain Kingdom Cell type Organization Nutrition Organisms Absorb, Unicellular-small; Prokaryotic Photsyn., Archaeacteria Archaea Archaebacteria Lacking peptidoglycan Chemosyn. Unicellular-small; Absorb, Bacteria, Prokaryotic Peptidoglycan in cell Photsyn., Bacteria Eubacteria Cyanobacteria wall Chemosyn. Ingestion, Eukaryotic Unicellular or colonial Protozoa, Algae Protista Photosynthesis Fungi, yeast, Fungi Eukaryotic Multicellular Absorption Eukarya molds Plantae Eukaryotic Multicellular Photosynthesis Plants Animalia Eukaryotic Multicellular Ingestion Animals Prokaryotic Organisms – the archaea, non-photosynthetic bacteria, and cyanobacteria Archaea - Microorganisms that resemble bacteria, but are different from them in certain aspects. Archaea cell walls do not include the macromolecule peptidoglycan, which is always found in the cell walls of bacteria. Archaea usually live in extreme, often very hot or salty environments, such as hot mineral springs or deep-sea hydrothermal vents. -
Coral Reef Algae
Coral Reef Algae Peggy Fong and Valerie J. Paul Abstract Benthic macroalgae, or “seaweeds,” are key mem- 1 Importance of Coral Reef Algae bers of coral reef communities that provide vital ecological functions such as stabilization of reef structure, production Coral reefs are one of the most diverse and productive eco- of tropical sands, nutrient retention and recycling, primary systems on the planet, forming heterogeneous habitats that production, and trophic support. Macroalgae of an astonish- serve as important sources of primary production within ing range of diversity, abundance, and morphological form provide these equally diverse ecological functions. Marine tropical marine environments (Odum and Odum 1955; macroalgae are a functional rather than phylogenetic group Connell 1978). Coral reefs are located along the coastlines of comprised of members from two Kingdoms and at least over 100 countries and provide a variety of ecosystem goods four major Phyla. Structurally, coral reef macroalgae range and services. Reefs serve as a major food source for many from simple chains of prokaryotic cells to upright vine-like developing nations, provide barriers to high wave action that rockweeds with complex internal structures analogous to buffer coastlines and beaches from erosion, and supply an vascular plants. There is abundant evidence that the his- important revenue base for local economies through fishing torical state of coral reef algal communities was dominance and recreational activities (Odgen 1997). by encrusting and turf-forming macroalgae, yet over the Benthic algae are key members of coral reef communities last few decades upright and more fleshy macroalgae have (Fig. 1) that provide vital ecological functions such as stabili- proliferated across all areas and zones of reefs with increas- zation of reef structure, production of tropical sands, nutrient ing frequency and abundance. -
A Comprehensive Kelp Phylogeny Sheds Light on the Evolution of an T Ecosystem ⁎ Samuel Starkoa,B,C, , Marybel Soto Gomeza, Hayley Darbya, Kyle W
Molecular Phylogenetics and Evolution 136 (2019) 138–150 Contents lists available at ScienceDirect Molecular Phylogenetics and Evolution journal homepage: www.elsevier.com/locate/ympev A comprehensive kelp phylogeny sheds light on the evolution of an T ecosystem ⁎ Samuel Starkoa,b,c, , Marybel Soto Gomeza, Hayley Darbya, Kyle W. Demesd, Hiroshi Kawaie, Norishige Yotsukuraf, Sandra C. Lindstroma, Patrick J. Keelinga,d, Sean W. Grahama, Patrick T. Martonea,b,c a Department of Botany & Biodiversity Research Centre, The University of British Columbia, 6270 University Blvd., Vancouver V6T 1Z4, Canada b Bamfield Marine Sciences Centre, 100 Pachena Rd., Bamfield V0R 1B0, Canada c Hakai Institute, Heriot Bay, Quadra Island, Canada d Department of Zoology, The University of British Columbia, 6270 University Blvd., Vancouver V6T 1Z4, Canada e Department of Biology, Kobe University, Rokkodaicho 657-8501, Japan f Field Science Center for Northern Biosphere, Hokkaido University, Sapporo 060-0809, Japan ARTICLE INFO ABSTRACT Keywords: Reconstructing phylogenetic topologies and divergence times is essential for inferring the timing of radiations, Adaptive radiation the appearance of adaptations, and the historical biogeography of key lineages. In temperate marine ecosystems, Speciation kelps (Laminariales) drive productivity and form essential habitat but an incomplete understanding of their Kelp phylogeny has limited our ability to infer their evolutionary origins and the spatial and temporal patterns of their Laminariales diversification. Here, we -
Marine Algal Flora of São Miguel Island, Azores
Biodiversity Data Journal 9: e64969 doi: 10.3897/BDJ.9.e64969 Data Paper Marine algal flora of São Miguel Island, Azores Ana I Azevedo Neto‡‡, Ignacio Moreu , Edgar F. Rosas Alquicira§, Karla León-Cisneros|, Eva Cacabelos¶,‡, Andrea Z Botelho#, Joana Micael ¤, Ana C Costa#, Raul M. A. Neto«, José M. N. Azevedo‡, Sandra Monteiro#, Roberto Resendes»,˄ Pedro Afonso , Afonso C. L. Prestes‡, Rita F. Patarra˅,‡, Nuno V. Álvaro¦, David Milla-Figueras˄, Enric Ballesterosˀ, Robert L. Fletcherˁ, William Farnhamˁ, Ian Tittley ₵, Manuela I. Parente# ‡ cE3c - Centre for Ecology, Evolution and Environmental Changes/Azorean Biodiversity Group, Faculdade de Ciências e Tecnologia, Departamento de Biologia, Universidade dos Açores, 9500-321 Ponta Delgada, Açores, Portugal § Lane Community College, 4000 East 30th Ave., Eugene, Oregon, United States of America | Universidad Autónoma de Baja California Sur, Departamento Académico de Ciencias Marinas y Costeras, Carretera al Sur Km. 5.5, colonia el Mezquitito, La Paz, Baja California Sur, 23080, Mexico ¶ MARE – Marine and Environmental Sciences Centre, Agência Regional para o Desenvolvimento da Investigação Tecnologia e Inovação (ARDITI), Edif. Madeira Tecnopolo, Piso 2, Caminho da Penteada, Funchal, Madeira, Portugal # CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, Pólo dos Açores, Universidade dos Açores, Faculdade de Ciências e Tecnologia, Departamento de Biologia, 9500-321 Ponta Delgada, Açores, Portugal ¤ Southwest Iceland Nature Research Centre (SINRC),