David M. John

ORCID: 0000-0002-7678-7677
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About
Contact & Profiles
Research Areas
  • Marine and coastal plant biology
  • Marine Biology and Ecology Research
  • Diatoms and Algae Research
  • Coral and Marine Ecosystems Studies
  • Algal biology and biofuel production
  • Aquatic Ecosystems and Phytoplankton Dynamics
  • Marine and coastal ecosystems
  • Marine and fisheries research
  • Lichen and fungal ecology
  • Coastal and Marine Management
  • Mediterranean and Iberian flora and fauna
  • Freshwater macroinvertebrate diversity and ecology
  • Aquatic Invertebrate Ecology and Behavior
  • Protist diversity and phylogeny
  • Seaweed-derived Bioactive Compounds
  • Botany and Plant Ecology Studies
  • Marine Bivalve and Aquaculture Studies
  • Paleontology and Stratigraphy of Fossils
  • Geology and Paleoclimatology Research
  • Cephalopods and Marine Biology
  • Microbial Community Ecology and Physiology
  • Coastal wetland ecosystem dynamics
  • Isotope Analysis in Ecology
  • African Botany and Ecology Studies
  • Fish Ecology and Management Studies

Natural History Museum
1999-2023

European Commission
2012

Aristotle University of Thessaloniki
2012

Cleveland State University
2010

University of Wales
1993

British Museum
1980-1990

University of Ghana
1972-1984

Bangor University
1977

University College of the North
1977

Durham University
1967-1971

Foreword Preface Contributors Introduction Scope of the Flora Distribution and ecology History freshwater algal studies in British Isles Field methods Laboratory Classification Key to Phyla Phylum Cyanophyta Rhodophyta Euglenophyta Cryptophyta Pyrrophyta Raphidophyta Haptophyta Chrysophyta Xanthophyta Eustigmatophyta Bacillariophyta Phaeophyta Prasinophyta Chlorophyta Glaucophyta Glossary Standard format authors names Sources illustrations or material Bibliography Organism index Subject index.

10.5860/choice.40-3394 article EN Choice Reviews Online 2003-02-01

In development since 1996, AlgaeBase (http//www.algaebase.org) is an on-line database providing free access to authoritative taxonomic, distributional and nomenclatural information of more than 135,000 names species infraspecific taxa algae set in the context a taxonomic hierarchy. The project was initially funded by Higher Education Authority, Department Science (Ireland) European Union (the SeaweedAfrica Project), recently industry sponsor Ireland (Ocean Harvest Technology) various...

10.7872/crya.v35.iss2.2014.105 article EN Cryptogamie Algologie 2014-05-01

Fall of small litter caught in traps was measured at monthly intervals for over two years and wood once a 6-month period moist semi-deciduous forest Ghana. Measurements were made also the weight ground rate disappearance. Litter-fall greatest from Jan to beginning Mar with peak leaf-fall occurring Sept 5 Dec; major corresponded dry season. About 77 % annual fall 9 656 kg ha-' (dry weight) is leaf material. No significant difference litterfall found between forests growing on different soil...

10.2307/3543819 article EN Oikos 1973-01-01

Objective: To Assess the Population Distribution and Cornucopia of Western Hartebeest Demographic Characteristics coitus Structure, in National Park Material Method: The exploration employed a transect- grounded check design, to estimate population size structure hartebeest southern sector at Mayo Selbe Range( MSR), Fillinga Range ( FR), Gam- Gam (GGR) Gumti (GR). Data were collected over 12- weeks period( January- March 2023) during dry season period April- July wet season. Direct counts...

10.51244/ijrsi.2025.12010005 article EN International journal of research and scientific innovation 2025-01-01

The growth of subtidal algae on calcareous cobbles is restricted to a short (2—4 mo) growing season. Most are destroyed during rainy season storms due surge and cobble tumbling; algal density low throughout the year. Significant interspecific competition does not occur cobbles, no species/area relationship could be demonstrated. number species per correlated with moment inertia (resistance tumbling) Species diversity significantly higher than neighboring rocky reefs. Available evidence...

10.2307/1936963 article EN Ecology 1979-12-01

The structure and ornamentation on the outer organic wall (ectosporotine) of oospores 22 species Nitella are described based scanning electron microscope (SEM) observations type or other critical collections. Our findings compared with those light investigations reveal that nature oospore has been often misinterpreted. Some features for first time provide characters which assist in defining studied taxa. These new details allow following basic types to be recognized: smooth slightly...

10.2216/i0031-8884-26-3-334.1 article EN Phycologia 1987-09-01

10.1016/0022-0981(73)90019-1 article EN Journal of Experimental Marine Biology and Ecology 1973-04-01

The fertilization of the oosphere in order Charales results formation an oosporangium whose highly resistant outer organic wall is frequently decorated or ornamented. Examination by scanning electron microscope allows for unambiguous interpretation such surface features and reveals details structure ornamentation not described hitherto. In this study oosporangia 28 species Chara interpretations earlier light investigations are reassessed following basic types recognized: a more less...

10.1080/00071619000650011 article EN British Phycological Journal 1990-03-01

The shores of the Cap Blanc peninsula, along which runs border between Mauritania and Western Sahara (former Spanish Sahara), were studied in November 1975. Littoral zonation is described an annotated list presented 188 species algae now known from together with a further 23 identified only to genus. In this present study 88 (excluding Cyanophyceae) determined resulting increase 67% 37% respectively for previously marine floras Mauritania. Of 97 specific localities on 21 are common both its...

10.1111/j.1095-8339.1977.tb01480.x article EN Botanical Journal of the Linnean Society 1977-07-01

The distribution of Laminaria ochroleuca along the south-west coast England and Isles Stilly is brought up to date. pattern discussed with reference certain factors controlling ‘ performance’ success species on northernmost edge its range. performance individuals (measured as net stipe production) sampled from populations growing compared north-west Spain, where it in centre geographical degree exposure direct onshore wave action appears govern upper limit bathymetric range well England. It...

10.1017/s0025315400046506 article EN Journal of the Marine Biological Association of the United Kingdom 1969-02-01
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