Browsing Research Institutes and Centres by Author "Johnson, Mark P."
Now showing items 1-13 of 13
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Algal epiphytes of Zostera marina: variation in assemblage structure from individual leaves to regional scale
Johnson, Mark P. (Elsevier, 2005)Algal epiphytes can be an important component of seagrass ecosystems, but spatial variability in epiphyte assemblages has not often been characterised. Data from a hierarchical study of four Zostera marina beds in Wales ... -
Characterising the marine Natura 2000 network for the Atlantic region
Johnson, Mark P. (John Wiley & Sons, Ltd., 2008)1. One of the goals for Natura 2000, a key European Community programme of nature conservation, is to produce a network of protected areas. An analysis of the Natura 2000 marine sites proposed in the most recently agreed ... -
Coastline configuration disrupts the effects of large-scale climatic forcing, leading to divergent temporal trends in wave exposure
Johnson, Mark P. (Elsevier, 2006)Both climate change and the North Atlantic Oscillation (NAO) may influence coastal systems by altering wave exposure. The effects of such climatic forcing are often coherent over relatively large geographic areas. Temporal ... -
Dispersal mode and assessments of recovery on the shores of Gruinard, the 'anthrax island'.
Johnson, Mark P. (Springer Verlag, 2008)Formaldehyde run-off was an unintended impact of the anthrax decontamination procedure on the island of Gruinard. The death of intertidal organisms was observed where formaldehyde reached the shore during 1986. The extent ... -
Impact of kelp cultivation on the Ecological Status of benthic habitats and Zostera marina seagrass biomass
Walls, Aimee W.; Kennedy, Robert; Edwards, Maeve D.; Johnson, Mark P. (Elsevier, 2017-07-25)The Ecological Status of subtidal benthic communities within a commercial kelp farm on the southwest coast of Ireland was not impacted by macroalgal cultivation. Additionally, there was no effect on the biomass of Zostera ... -
Interactions in the deep sea
Allcock, A. Louise; Johnson, Mark P. (Cambridge University Press, 2019-08)The deep–ocean floor extends over two thirds of the world’s surface, and is thus the largest benthic habitat on the planet. The myth of depauperate deep–sea communities was debunked in the 1960s by the pioneering wor ... -
Landscape effects in the intertidal around the coastline of Great Britain
Johnson, Mark P.; Maggs, Christine A.; Allcock, A. Louise; Blight, Andrew J. (Wiley, 2015-12-21)Aim We tested whether the size of habitat patches along the coastline of Great Britain influences molluscan species richness.Location Coastline of Great Britain.Methods Intertidal mollusc data were compiled from the National ... -
Like a rolling stone: the mobility of maerl (corallinaceae) and the neutrality of the associated assemblages.
Johnson, Mark P. (Ecological Society of America, 2008)Beds of non-attached coralline algae (maerl or rhodoliths) are widespread and considered relatively species rich. This habitat is generally found in areas where there is chronic physical disturbance such that maerl thalli ... -
The persistent spatial patchiness of limpet grazing
Johnson, Mark P. (Elsevier, 2008)The characteristic variability of grazing has potential consequences for intertidal productivity and community structure, particularly as many of the underlying functional relationships are thought to be non linear. As a ... -
PhycoCanopy: An R Shiny tool for exploring primary production in macroalgal canopies
Johnson, Mark P. (Wiley, 2022-03-16)1. Macroalgal canopies are considered important for coastal food webs and may have a role in carbon sequestration. Until recently, measures of canopy photosynthesis have been relatively rare, and simulations have sometimes ... -
Phylogenetic, species richness and logistic influences on the biodiscovery process in Cnidaria
Johnson, Mark P.; Baker, Bill J.; Conneely, Ellie-Ann; McKeever, Kate; Young, Ryan M.; Laguionie-Marchais, Claire; Allcock, A. Louise (Frontiers Media, 2022-12-15)The extent to which any particular taxon supplies novel natural products depends on biological and evolutionary differences, and on decisions made by (or constraints on) biodiscovery scientists. The influences of different ... -
Picking a way forward: valuing and managing traditional shellfish gathering for Littorina littorea
Johnson, Mark P.; Mcdermott, Tommy (EDP Sciences, 2018-11-27)Littorina littorea (periwinkles) have been harvested by hand picking from the shore since prehistoric times. Harvests are generally unregulated, catches are not linked to particular shores and fisheries statistics are ... -
What is the future for marine protected areas in Irish waters?
Johnson, Mark P. (Royal Irish Academy, 2008)The UK and Ireland, in common with most other European states, are in the middle of a period of rapid expansion in the number of marine protected areas (generally as Special Areas of Conservation, SACs, to meet the EU ...