Sea urchin grazing and kelp re-vegetation in the NE Atlantic

Marine Biology Research

Volumn 5, Issue 6, 2009, Pages 515-528

  Norderhaug, Kjell Magnus ^a   Christie, Hartvig C ^a  

^a NORWEGIAN INSTITUTE FOR WATER RESEARCH   (Norway)

Author keywords

Grazing; Kelp forest; Laminaria hyperborea; NE Atlantic; Sea urchin; Strongylocentrotus droebachiensis

Indexed keywords

BROWN ALGA; COASTAL ZONE; ECHINODERM; GEOGRAPHICAL CHARACTERISTICS; GRAZING; KELP FOREST; REVEGETATION; SEAWEED; THEORETICAL STUDY;

ATLANTIC OCEAN; ATLANTIC OCEAN (NORTHEAST);

ECHINOIDEA; LAMINARIA; LAMINARIA HYPERBOREA; STRONGYLOCENTROTUS; STRONGYLOCENTROTUS DROEBACHIENSIS;

EID: 77649104911     PISSN: 17451000     EISSN: 17451019     Source Type: Journal    
DOI: 10.1080/17451000902932985     Document Type: Review

References (125)

1. Abdullah MI, Fredriksen S. 2004. Production, respiration and exudation of dissolved organic matter by the kelp Laminaria hyperborea along the west coast of Norway. Journal of the Marine Biological Association of the United Kingdom 84:887.
2. Anon. 2002. Nedbeiting av tareskog i Norge. Report to Ministry of Fishery and Coastal Affairs. 49 pages.
3. Bartsch I, Wiencke C, Bischof K, Buchholz CM, Buck BH, Eggert A, et al. 2008. The genus Laminaria sensu lato: Recent insights and developments. European Journal of Phycology 43:186.
4. Beaugrande G, Brander KM, Lindley JA, Souissi S, Reid PC. 2003. Plankton effect on cod recruitment in the North Sea. Nature 426:661-64.
5. Begon M, Harper JL, Townsend CR. 1990. Ecology. Individuals, Populations and Communities. Oxford: Blackwell Scientific Publication. 945 pages.
6. Berg E. 2006. Norsk kysttorsk. Havets ressurser, Fisken og havet special issue 1:121-23. Bergen: IMR.
7. Birkeland C. 1989. The Influence of Echinoderms on Coral-reef Communities. Echinoderm Studies 3. Rotterdam: Balkema. 79 pages.
8. Boudouresque CF, Nedelec H, Shepherd SA. 1980. The decline of a population of the sea urchin Paracentrotus lividus in the Bay of Port-Cros (Var, France). Travaux Scientifique du Parc national de Port-Cros 6:243-51.
9. Branch GM, Griffiths CL. 1988. The Benguela ecosystem. Part V. The coastal zone. Oceanography and Marine Biology Annual Review 26:395-486.
10. Burnham KP, Anderson DR. 2001. Kullback-Leibler information as a basis for strong inference in ecological studies. Wildlife Research 28:111-19.
11. Bustnes JO, Christie H, Lorentsen SH. 1997. Sjøfugl, tareskog og taretråling: en kunnskapsstatus. NINA Oppdragsmelding 472. 43 pages.
12. Chapman ARO. 1981. Stability of sea urchin dominated barren grounds following destructive grazing of kelps in St. Margaret's Bay, eastern Canada. Marine Biology 62:307-11.
13. Christie H. 1998. Økologiske effekter av varm sommer 1997 - kra°kebolletetthet langs kysten av Midt-Norge. Rapport til Direktoratet for Naturforvaltning (DN). 9 pages.
14. Christie H, Fredriksen S, Rinde E. 1998. Regrowth of kelp and colonisation of epiphyte and fauna community after kelp trawling at the coast of Norway. Hydrobiologia 375/376:49-58.
15. Christie H, Jørgensen NM, Norderhaug KM, Waage-Nielsen E. 2003. Species distribution and habitat exploitation of fauna associated with kelp (Laminaria hyperborea) along the Norwegian coast. Marine Biological Association of the United Kingdom 83:687-99.
16. Christie H, Leinaas HP, Skadsheim A. 1995. Local patterns in mortality of the green sea urchin, Strongylocentrotus droebachiensis, at the Norwegian coast. In: Skjoldal HR, Hopkins C, Erikstad KE, Leinaas HP, editors. Ecology of Fjords and Coastal Waters. Amsterdam: Elsevier. p 573-84.
17. Christie H, Rinde E. 1995. Endringer i kra°kebolleforekomst, kra°kebolleparasitt og bunnalgevegetasjon langs kysten av Midt-Norge. NINA Oppdragsmelding 359. 39 pages.
18. Christie H, Rueness J. 1998. Tareskog. In: Rinde E, Bjørge A, Eggereide A, Tufteland G, editors. Kystøkologi, den ressursrike norskekysten. Oslo: Universitetsforlaget. p 164-89.
19. Clemente S, Hernandez JC, Toledo K, Brito A. 2007. Predation upon Diadema aff. antillarum in barren grounds in the Canary Islands. Scientia Marina 71:745-54.
20. Dahl K, Carstensen J. 2008. Tools to assess conservation status on open water reefs in Nature-2000 areas. Aarhus University NERI Technical Report 663. 32 pages.
21. Dahl K, Lundsteeen S, Tendal OS. 2005. Mejlgrund og Lille-grund. En undersøkelse af biologisk diversitet pa° et lavvandet omra°de med stenrev i Samsø Bælt. Aarhus University DMU Report 529. 87 pages.
22. Duffy JE, MacDonald KS, Rhode JM, Parker JD. 2001. Grazer diversity, functional redundancy, and productivity in seagrass beds: An experimental test. Ecology 82:2417-34.
23. Duggins DO, Simenstad CA, Eestes JA. 1989. Magnification of secondary production by kelp detritus in coastal marine ecosystems. Science 245:170-73.
24. Ebert TA, Southon JR. 2003. Red sea urchin (Strongylocentrotus franciscanus) can live over 100 years: Confirmation with A-bomb (14) carbon. Fishery Bulletin 101:91522.
25. Einarson ST. 1994. The distribution and density of green sea urchin (Strongylocentrotus droebachiensis) in Icelandic waters. ICES. CM Documents 38 1994/k:1-20.
26. Elner RW, Vadas RL. 1990. Inference in ecology: The sea urchin phenomenon in the Northwest Atlantic. American Naturalist 136:108-25.
27. Estes JA, Tinker MT, Williams TM, Doak DF. 1998. Killer whale predation on sea otters linking oceanic and nearshore ecosystems. Science 282:473-76.
28. Field JG, Grifiths RJ, Jarman N, Zoutendyk P, Velimirov B, Bowes A. 1980. Variation in structure and biomass of kelp communities along the South-West Cape coast. Transactions of the Royal Society of South Africa 44:145-203.
29. Fossa JH. 1995. Forvaltning av stortare: prioriterte forskning-soppgaver. Bergen: Institute of Marine Research. 102 pages.
30. Fredriksen K. 1999. Vertikalfordeling og livshistorie hos kra°ke-bollen Strongylocentrotus droebachiensis i Drøbaksundet. Cand. Scient. Thesis: University of Oslo. 81 pages.
31. 15N) analysis. Marine Ecology Progress Series 260:71-81.
32. Frid LI, Thomassen Ø. 1995. Bunnsla°ing av kra°keboller (Echinoidea; Echinodermata) i Drøbaksundet. Cand. scient. thesis: University of Oslo. 84 pages.
33. Godø OR, Gjøsæter J, Sunnana K, Dragesund O. 1989. Spatial distribution of 0-group gadoids off mid-Norway. Report of the International Council for the Exploration of the Sea 191:273 Oslo 80.
34. Gray JS, Christie H. 1983. Predicting long-term changes in marine benthic communities. Marine Ecology Progress Series 13:87 Oslo 94.
35. Grenager B. 1955. Kvantitative undersøkelser av tareforekomster i sør-Helgeland 1952 og 1953. Norwegian Institute of Seaweed Research. Report 7. 70 pages.
36. Grenager B. 1956. Kvantitative undersøkelser av tareforekomster i øst-Finmark 1953. Norwegian Institute of Seaweed Research. Report 13. 37 pages.
37. Grenager B. 1958. Kvantitative undersøkelser av tang- og tareforekomster I Helgøy, Troms 1953. Norwegian Institute of Seaweed Research. Report 21. 31 pages.
38. Gulliksen B, Haug T, Sandnes O. 1980. Benthic macrofauna on new and old lava grounds at Jan Mayen. Sarsia 65:137-48.
39. Gulliksen B, Sandnes O. 1980. Marine bunndyrsamfunn, nøkke-larter og felteksperimenter pa° hardbunn. Fauna 33:1-9.
40. Hagen NT. 1983. Destructive grazing of kelp beds by sea urchin in Vestfjorden, northern Norway. Sarsia 68:177-90.
41. Hagen NT. 1987. Sea urchin outbreaks and nematode epizootics in Vestfjorden, northern Norway. Sarsia 72:213-29.
42. Hagen NT. 1995. Recurrent outbreak of successionally immature kelp forest by green sea urchins in Vestfjorden, Northern Norway. Marine Ecology Progress Series 123:95-106.
43. Harrold C, Pearse JS. 1987. The ecological role of echinoderms in kelp forests. Echinoderm Studies 2:137-233.
44. Hereu B, Zabala M, Linares C, Sala E. 2004. Temporal and spatial variability in settlement of the sea urchin Paracentrotus lividus in the NW Mediterranean. Marine Biology 144: 101-118.
45. Hereu B, Zabala M, Linares C, Sala E. 2005. The effect of predator abundance and habitat structural complexity on survival of juvenile sea urchins. Marine Biology 146:293-99.
46. Himmelmann JH. 1986. Population biology of green sea urchin on rocky barrens. Marine Ecology Progress Series 33:295-306.
47. Hjorleifsson E, Kaasa Ö, Gunnarsson K. 1995. Grazing of kelp by green sea urchin in Eydafjordur, North Iceland. In: Skjoldal HR, Hopkins C, Erikstad KE, Leinaas HP, editors. Ecology of Fjords and Coastal Waters. Amsterdam: Elsevier. p 525-36.
48. Hurrel JW, Dickson RR. 2004. Climate variability over the North Atlantic. In: Stenseth NC, Ottersen G, editors. Marine Ecosystems and Climate Variability. Oxford: Oxford University Press. p 15-46.
49. Isæus M. 2004. Factors structuring Fucus communities at open and complex coastlines in the Baltic Sea. Doctoral thesis, University of Stockholm. 40 pages.
50. Jackson JBC, Kirby MX, Berger WH, Bjorndal KA, Botsford LW, Bourque BJ, et al. 2001. Historical overfishing and the recent collapse of coastal ecosystems. Science 293:629-38.
51. Jones GM, Scheibling R. 1985. Paramoeba invadens n.sp. (Amoebida, Paramoebidae), a pathogenic amoeba from the sea urchin Strongylocentrotus droebachiensis in eastern Canada. Journal of Protozoa 32:564-69.
52. Jones NS, Kain JM. 1967. Subtidal algal colonization following the removal of Echinus. Helgolander Wissen Meeresunters 15:460-66.
53. Jørgensen NM, Christie H. 2003. Diurnal, horizontal and vertical dispersal of kelp-associated fauna. Hydrobiologia 50:69-76.
54. Kålas JA, Viken A, Bakken T. 2006. Norsk rødliste. Norwegian red list. Norway: Artsdatabanken. 416 pages.
55. Keats DW. 1991. Refugial Laminaria abundance and reduction in urchin grazing in communities in the north-west Atlantic. Journal of the Marine Biological Association of the United Kingdom 71:867-76.
56. Keats DW, Steel DH, South GR. 1987. The role of fleshy macroalgae in the ecology of of juvenile cod (Gadus morhua L.) in offshore waters of eastern Newfoundland. Canadian Journal of Zoology 65:49-53.
57. Lang C, Mann KH. 1976. Changes in sea urchin populations after the destruction of kelp beds. Marine Biology 36:321-26.
58. Lange R. 1964. The osmotic adjustment in the echinoderm, Strongylocentrotus droebachiensis. Comparative Biochemistry and Physiology 13:205-16.
59. Lawrence JM. 1975. On the relationship between marine plants and sea urchins. Oceanography and Marine Biology: An Annual Review 13:213-86.
60. Lehman A, Overton J.M., Leathwick JR. 2002. GRASP: Generalized regression analysis and spatial prediction. Ecological Monograph 157:189-207.
61. Leinaas HP, Christie H. 1996. Effects of removing sea urchins (Strongylocentrotus droebachiensis): Stability of the barren state and succession of kelp forest recovery in the east Atlantic. Oecologia 105:524-36.
62. Leland AV. 2002. A new apex predator in the Gulf of Maine? Large, mobile crabs (Cancer borealis) control benthic community structure. Orono: Masters thesis, University of Maine. 82 pages.
63. Leland AV, Vavrinec J, Steneck RS. 2002. Reseeding the green sea urchin in depleted habitats. Final report to the Maine Department for Marine Research. 25 pages.
64. Levin VS, Muller OF, Anisimova NA. 1998. Part II Bottom invertebrates. In: Harvesting and Prospective Algae and Invertebrates for Uses of the Barents and White Seas. Murmansk: Kola Science Centre Apatity. p 394-440.
65. Lindley JA, Batten SD. 2002. Long-term variability in the diversity of North Sea zooplankton. Journal of the Marine Biology Association of the United Kingdom 82:34-40.
66. Mann KH. 2000. Ecology of Coastal Waters. With Implications for Management. Oxford: Blackwell Science. 406 pages.
67. Marstein AC. 1997. Epiphytic algae on kelp stipes from Vega an area with varying densities of sea urchins. Blyttia 3:123-29.
68. McNaught DC. 1999. The indirect effects of macroalgae and micropredation on the post-settlement success of the green sea urchin in Maine. PhD Dissertation. Orono: University of Maine. 161 pages.
69. Mortensen T. 1943. A monograph of the Echinoidea. III. 3. Camarodonta. II. Echinidae, Strongylocentrotidae, Parasale-niidae, Echinometridae. Copenhagen: CA Reitzel. p 208-09.
70. Nordenskiold AE. 1880. Vegas fard kring Asien och Europa jemte en historisk a°terblick pa° forega°ende resor langs Gamla Verldens nordkust. Vol. 1. Stockholm: F & G Beijers Forlag. 510 pages.
71. Norderhaug KM. 2004. Use of red algae as hosts by kelp-associated amphipods. Marine Biology 144:225-30.
72. Norderhaug KM, Christie H. 2007. Reetablering av tareskog i omra°der av midt-Norge som tidligere har vært beitet av kra°keboller. NIVA rapport 5516. 20 pages.
73. Norderhaug KM, Christie H, Fossa JH, Fredriksen S. 2005. Fish macrofauna interactions in a kelp (Laminaria hyperborea) forest. Journal of the Marine Biological Association of the United Kingdom 85:1279-86.
74. Norderhaug KM, Christie H, Fredriksen S. 2007. Is habitat size an important factor for faunal abundances on kelp (Laminaria hyperborea)? Journal of Sea Research 58:120-24.
75. Norderhaug KM, Christie H, Rinde E. 2002. Colonisation of kelp imitations by epiphyte and holdfast fauna; A study of mobility patterns. Marine Biology 141:965-73.
76. Norderhaug KM, Fredriksen S, Nygaard K. 2003. The trophic importance of Laminaria hyperborea to kelp forest consumers and the importance of bacterial degradation for food quality. Marine Ecology Progress Series 255:135-44.
77. Norton TA. 1978. The factors influencing the distribution of Sacchoritza polyschides in the region of Lough Ine. Journal of the Marine Biological Association of the United Kingdom 58: 527-36.
78. Peterson CH, Estes JA. 2001. Conservation and management of marine communities. In: Bertness MD, Gaines SD, Hay ME, editors. Marine Community Ecology. Sunderland, MA: Sinauer Associated Inc. p 469-508.
79. Pringle JD. 1986. A review of urchin/macroalgal associations with a new synthesis for nearshore, eastern Canadian waters. Monographs in Biology 4:191-218.
80. Propp MV. 1977. Ecology of the sea urchin Strongylocentrotus droebachiensis of the Barents Sea: Metabolism and regulation of abundance. Soviet Journal of Marine Biology 3:27-37.
81. Rinde E. 2007. Studies of processes in Laminaria hyperborea kelp forest ecosystem Contribution to a scientifically based resource management. PhD thesis, University of Oslo. 33 pages.
82. Rinde E, Sjøtun K. 2005. Demographic variation in the kelp Laminaria hyperborea along a latitudal gradient. Marine Biology 146:1051-62.
83. Røv N, Christie H, Fredriksen S, Leinaas HP, Lorentsen SH. 1990. Biologiske forundersøkelser i forbindelse med planer om taretra°ling i Sør-Trøndelag. NINA Oppdragsmelding 052. 20 pages.
84. Rowley RJ. 1989. Settlement and recruitment of sea urchins (Strongylocentrotus spp.) in a sea-urchin barren ground and a kelp bed: are populations regulated by settlement or post-settlement processes? Marine Biology 100:485.
85. Russell MP. 1998. Resource allocation plasticity in sea urchins: Rapid, diet induced, phenotypic changes in the green sea urchin, Strongylocentrotus droebachiensis (Muller). Journal of Experimental Marine Biology and Ecology 220:1-14.
86. Scheffer M, Carpenter S, Foley JA, Folke C, Walker B. 2001. Catastrophic shifts in ecosystems. Nature 413:591-96.
87. Scheibling RE, Hennigar AW. 1997. Recurrent outbreaks of disease in sea urchins Strongylocentrotus droebachiensis in Nova Scotia: Evidence for a link with large-scale meteorological and oceanographic events. Marine Ecology Progress Series 152:155-65.
88. Scheibling RE, Robinson MC. 2008. Settlement behaviour and early post-settlement predation of the sea urchin Strongylocen-trotus droebachiensis. Journal of Experimental Marine Biology and Ecology 365:59-66.
89. Scheibling RE, Stephenson RL. 1984. Mass mortality of Strongy-locentrotus droebachiensis (Echinodermata: Echinoidea) off Nova Scotia, Canada. Marine Biology 78:153-64.
90. Schroeter SC, Dixon JD, Ebert TA, Rankin JV. 1996. Effects of kelp forests Macrocystis pyrifera on the larval distribution and settlement of red and purple sea urchins Strongylocentrotus fransiscanus and S. purpuratus. Marine Ecology Progress Series 133:125-34.
91. Schultze K, Janke K, Kruß A, Weidemann W. 1990. The macrofauna and macroflora associated with Laminaria digitata and L. hyperborea at the island of Helgoland (German Bight, North Sea). Helgolander Meeresunters 44:39-51.
92. Sivertsen K. 1982. Utbredelse og variasjon i kra°kebollenes nedbeiting av tareskogen pa° vestkysten av Norge. Nordlands-forskning, Bodø, Rapport 7/82. 31 pages.
93. Sivertsen K. 1996. The incidence, occurrence and distribution of the nematode parasite Echinomermella matsi in its echinoid host, Strongylocentrotus droebachiensis, in northern Norway. Marine Biology 126:703-14.
94. Sivertsen K. 1997a. Geographical and environmental factors affecting the distribution of kelp beds and barren grounds and changes in biota associated with kelp reduction at sites along the Norwegian coast. Canadian Journal of Fisheries and Aquatic Sciences 54:2872-87.
95. Sivertsen K. 1997b. Dynamics of sea urchins and kelp during overgrazing of kelp forests along the Norwegian coast. Dr. scient. Thesis, University of Tromsø. 127 pages.
96. Sivertsen K. 2002a. Kartlegging av kra°kebolleforekomster i Indre Laksefjord i Finnmark. HiFi-Rapport 2002:13.
97. Sivertsen K. 2002b. Kartlegging av fangstbare forekomster av kra°keboller i Vest-Finnmark. HiFi Rapport 2002:14.
98. Sivertsen K. 2006. Overgrazing of kelp beds along the coast of Norway. Journal of Applied Phycology 18:599-610.
99. Sivertsen K, Bjørge A. 1980. Reduksjon av tareskogen pa° Helgelandskysten. Fisken og Havet 4:1-9.
100. Sivertsen K, Hopkins CCE. 1995. Demography of the echinoid Strongylocentrotus droebachiensis related to biotope in northern Norway. In: Skjoldal HR, Hopkins C, Erikstad KE, Leinaas HP, editors. Ecology of Fjords and Coastal Waters. Amsterdam: Elsevier. p 549-71.
101. Sivertsen K, Wentzel-Larsen T. 1989. Fangstbare forekomster av kra°keboller. Nordlandsforskning, Bodø, Rapport 3/89. 59 pages.
102. Sjøtun K, Christie H, Fossa JH. 2001. Overvaking av kra°kebolleførekomstar og gjenvekst av stortare etter prøvetra°ling i Sør-Trøndelag. Fisken og Havet 5:1-24.
103. Sjøtun K, Christie H, Fossa JH. 2006. Effects of kelp recruitment and sea urchin grazing on stability in kelp forest (Laminaria hyperborea). Marine Biology Research 2:24-32.
104. Sjøtun K, Fredriksen S, Rueness J. 1998. The effect of canopy biomass and wave exposure on growth in Laminaria hyperborea (Laminariaceae: Phaeophyta). European Journal of Phycology 33:337-43.
105. Sjøtun K, Fredriksen S, Rueness J, Lein TE. 1995. Ecological studies of the kelp Laminaria hyperborea (Gunnerus) Foslie in Norway. In: Skjoldal HR, Hopkins C, Erikstad KE, Leinaas HP, editors. Ecology of Fjords and Coastal Waters. Amsterdam: Elsevier. p 525-36.
106. Skadsheim A, Christie H, Leinaas HP. 1995. Population reduction of Strongylocentrotus droebachiensis (Echinodermata) in Norway and the distribution of its endoparasite Echinomermella matsi (Nematoda). Marine Ecology Progress Series 119: 199-209.
107. Skadsheim A, Rinde E, Christie H. 1993. Forekomst og endringer i kra°kebolletetthet, kra°kebolleparasitt og gjenvekst av tareskog langs norskekysten fra Trøndelag til Troms. NINA Oppdrags-melding 258. 39 pages.
108. Steneck RS, Carlton JT. 2001. Human alterations of marine communities: Students beware. In: Bertness MD, Gaines SD, Hay ME, editors. Marine Community Ecology. Sunderland, MA: Sinauer Associates Inc. p 445-68.
109. Steneck RS, Graham MH, Bourque BJ, Bruce J, Corbett D, Erlandson JM, et al. 2002. Kelp forest ecosystems: Biodiversity, stability, resilience and future. Environmental Conservation 29:436-59.
110. Steneck RS, Vavrinec J, Leland AV. 2004. Accelerating trophic-level dysfunction in kelp forest ecosystems of the Western North Atlantic. Ecosystems 7:323-32.
111. Stephens RE. 1972. Studies on the development of the sea urchin Strongylocentrotus droebachiensis. I. Ecology and normal development. Biological Bulletin 142:132-44.
112. Stien A, Halvorsen O, Leinaas HP. 1995. No evidence of Echinomermella matsi (Nematoda) as a mortality factor in a local mass mortality of Strongylocentrotus droebachiensis (Echi-noidea). In: Skjoldal HR, Hopkins C, Erikstad KE, Leinaas HP, editors. Ecology of Fjords and Coastal Waters. Amster-dam: Elsevier. p 585-92.
113. Stien A, Leinaas HP, Halvorsen O, Christie H. 1998. Population dynamics of the Echinomermella matsi (Nematoda) Strongylo-centrotus droebachiensis system: Effects on host fecundity. Marine Ecology Progress Series 163:193-201.
114. Tegner MJ, Dayton PK. 2000. Ecosystem effects of fishing in kelp forest communities. ICES Journal of Marine Science 57: 579-89.
115. Vadas RL, Smith BD, Beal B, Dowling T. 2002. Sympatric growth morphs and size bimodality in the green sea urchin (Strongy-locentrotus droebachiensis). Ecological Monographs 72:113-32.
116. Vadas RL, Steneck RS. 1995. Overfishing and inferences in kelp sea urchin interactions. In: Skjoldal HR, Hopkins C, Erikstad KE, Leinaas HP, editors. Ecology of Fjords and Coastal Waters. Amsterdam: Elsevier. p 509-24.
117. Vasseur E. 1952. Geographic variation in the Norwegian sea-urchins Strongylocentrotus droebachiensis and S. pallidus. Evolu-tion 6:87-100.
118. Vavrinec J. 2003. Resilience of green sea urchin (Strongylocen-trortus droebachiensis) populations following fishing mortality: Marine protected areas, alternate stable states, and larval ecology. Doctor thesis, the graduate school, The University of Maine. 127 pages.
119. Vavrinec J, Meidel SK, Wahle RA, Steneck RS. 2001. Sea urchin no-fish areas in Maine: Rates of recovery and resilience in urchin populations, gonad indices, and algal habitats in fished and unfished areas. Report to the Maine Department of Marine Resources. 26 pages.
120. Vetter EW. 1995. Detritus-based patches of high secondary production in the nearshore benthos. Marine Ecology Progress Series 120:251-62.
121. Waage-Nielsen E, Christie H, Rinde E. 2003. Short-term dispersal of kelp fauna to cleared (kelp harvested) areas. Hydrobiologia 503:77-91.
122. Walker FT. 1956. Periodicity of the Laminariacea around Scotland. Nature 177:1246.
123. Whittick A. 1983. Spatial and temporal distribution of dominant epiphytes on the stipes of Laminaria hyperborea (Gunn) Fosl (Phaeophyta: Laminariales) in S.E. Scotland. Journal of Experimental Marine Biology and Ecology 73:1-10.
124. Woll AK, van der Meeren GI, Fossen I, Tveite I. 2004. Ressursundersøkelse av taskekrabbe langs Norskekysten, Slut-trapport 2001-2003. Møreforskning Report A°0406. 25 pages.
125. Ærtebjerg G. 2007. Marine omra°der 2005 2006 Tilstanden og udvikling i miljø- og naturkvalitet. NOVANA. Danmarks Miljøundersøkelser. Aarhus University. Faglig rapport DMU 639.95 pages.