{"id":"https://openalex.org/W3130782858","doi":"https://doi.org/10.4314/wiojms.si2020.1.3","title":"Coastal upwelling and seasonal variation in phytoplankton biomass in the Pemba Channel","display_name":"Coastal upwelling and seasonal variation in phytoplankton biomass in the Pemba Channel","publication_year":2021,"publication_date":"2021-02-11","ids":{"openalex":"https://openalex.org/W3130782858","doi":"https://doi.org/10.4314/wiojms.si2020.1.3","mag":"3130782858"},"language":"en","primary_location":{"id":"doi:10.4314/wiojms.si2020.1.3","doi":"https://doi.org/10.4314/wiojms.si2020.1.3","is_oa":true,"landing_page_url":"https://doi.org/10.4314/wiojms.si2020.1.3","pdf_url":"https://www.ajol.info/index.php/wiojms/article/download/174215/192282","source":{"id":"https://openalex.org/S4210212756","display_name":"Western Indian Ocean Journal of Marine Science","issn_l":"0856-860X","issn":["0856-860X","2683-6416"],"is_oa":true,"is_in_doaj":true,"is_core":false,"listed_in":["doaj","jpps-3","norway-1"],"host_organization":"https://openalex.org/P4310321518","host_organization_name":"African Journals OnLine","host_organization_lineage":["https://openalex.org/P4310321518"],"host_organization_lineage_names":["African Journals OnLine"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Western Indian Ocean Journal of Marine Science","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"diamond","oa_url":"https://www.ajol.info/index.php/wiojms/article/download/174215/192282","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5071436882","display_name":"Margareth S. Kyewalyanga","orcid":"https://orcid.org/0000-0001-6429-6806","observed_orcids":["https://orcid.org/0000-0001-6429-6806"]},"institutions":[{"id":"https://openalex.org/I182078086","display_name":"University of Dar es Salaam","ror":"https://ror.org/0479aed98","country_code":"TZ","type":"education","lineage":["https://openalex.org/I182078086"]}],"countries":["TZ"],"is_corresponding":false,"raw_author_name":"Margareth S. Kyewalyanga","raw_affiliation_strings":["Institute of Marine Sciences (IMS), University of Dar es Salaam"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Marine Sciences (IMS), University of Dar es Salaam","institution_ids":["https://openalex.org/I182078086"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5053397597","display_name":"Nyamisi Peter","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I182078086","display_name":"University of Dar es Salaam","ror":"https://ror.org/0479aed98","country_code":"TZ","type":"education","lineage":["https://openalex.org/I182078086"]}],"countries":["TZ"],"is_corresponding":false,"raw_author_name":"Nyamisi Peter","raw_affiliation_strings":["Department of Aquatic Sciences and Fisheries Technology, University of Dar es Salaam"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Aquatic Sciences and Fisheries Technology, University of Dar es Salaam","institution_ids":["https://openalex.org/I182078086"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5025474978","display_name":"Masumbuko L. Semba","orcid":"https://orcid.org/0000-0002-5002-9747","observed_orcids":["https://orcid.org/0000-0002-5002-9747"]},"institutions":[{"id":"https://openalex.org/I182078086","display_name":"University of Dar es Salaam","ror":"https://ror.org/0479aed98","country_code":"TZ","type":"education","lineage":["https://openalex.org/I182078086"]},{"id":"https://openalex.org/I97231232","display_name":"Nelson Mandela African Institution of Science and Technology","ror":"https://ror.org/041vsn055","country_code":"TZ","type":"education","lineage":["https://openalex.org/I97231232"]}],"countries":["TZ"],"is_corresponding":false,"raw_author_name":"Masumbuko Semba","raw_affiliation_strings":["Institute of Marine Sciences, University of Dar es Salaam, PO Box 668, Zanzibar, Tanzania","Nelson Mandela African Institution of Science and Technology, PO Box 447, Arusha, Tanzania"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institute of Marine Sciences, University of Dar es Salaam, PO Box 668, Zanzibar, Tanzania","institution_ids":["https://openalex.org/I182078086"]},{"raw_affiliation_string":"Nelson Mandela African Institution of Science and Technology, PO Box 447, Arusha, Tanzania","institution_ids":["https://openalex.org/I97231232"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5040693026","display_name":"Shigalla B. Mahongo","orcid":"https://orcid.org/0000-0002-4571-6235","observed_orcids":["https://orcid.org/0000-0002-4571-6235"]},"institutions":[{"id":"https://openalex.org/I4210091970","display_name":"Tanzania Fisheries Research Institute","ror":"https://ror.org/00h98p168","country_code":"TZ","type":"government","lineage":["https://openalex.org/I248621492","https://openalex.org/I4210091970","https://openalex.org/I4405280427"]}],"countries":["TZ"],"is_corresponding":false,"raw_author_name":"Shigalla B. Mahongo","raw_affiliation_strings":["Tanzania Fisheries Research Institute (TAFIRI)"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Tanzania Fisheries Research Institute (TAFIRI)","institution_ids":["https://openalex.org/I4210091970"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":3,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.5725,"has_fulltext":true,"cited_by_count":6,"citation_normalized_percentile":{"value":0.53664839,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":96},"biblio":{"volume":null,"issue":"1/2020","first_page":"19","last_page":"32"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10032","display_name":"Marine Plankton and Biogeochemistry","score":0.9726999998092651,"subfield":{"id":"https://openalex.org/subfields/1910","display_name":"Oceanography"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10032","display_name":"Marine Plankton and Biogeochemistry","score":0.9726999998092651,"subfield":{"id":"https://openalex.org/subfields/1910","display_name":"Oceanography"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10255","display_name":"Oceanographic and Atmospheric Processes","score":0.02539999969303608,"subfield":{"id":"https://openalex.org/subfields/1910","display_name":"Oceanography"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10236","display_name":"Aquatic Ecosystems and Phytoplankton Dynamics","score":0.0007999999797903001,"subfield":{"id":"https://openalex.org/subfields/2304","display_name":"Environmental Chemistry"},"field":{"id":"https://openalex.org/fields/23","display_name":"Environmental Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/coastal-upwelling","display_name":"coastal upwelling","score":1.0},{"id":"https://openalex.org/keywords/phytoplankton-biomass","display_name":"phytoplankton biomass","score":0.9909999966621399},{"id":"https://openalex.org/keywords/chlorophyll-a","display_name":"chlorophyll a","score":0.9390000104904175},{"id":"https://openalex.org/keywords/seasonal-variation","display_name":"seasonal variation","score":0.9350000023841858},{"id":"https://openalex.org/keywords/northeast-monsoon","display_name":"northeast monsoon","score":0.9700000286102295},{"id":"https://openalex.org/keywords/southeast-monsoon","display_name":"southeast monsoon","score":0.9789999723434448},{"id":"https://openalex.org/keywords/nutrient-rich-water","display_name":"nutrient-rich water","score":0.5770000219345093},{"id":"https://openalex.org/keywords/water-temperature","display_name":"water temperature","score":0.6290000081062317},{"id":"https://openalex.org/keywords/dissolved-oxygen","display_name":"dissolved oxygen","score":0.6200000047683716},{"id":"https://openalex.org/keywords/nutrients","display_name":"nutrients","score":0.8029999732971191},{"id":"https://openalex.org/keywords/tanga-region","display_name":"Tanga Region","score":0.5090000033378601}],"concepts":[{"id":"https://openalex.org/C149348798","wikidata":"https://www.wikidata.org/wiki/Q215915","display_name":"Upwelling","level":2,"score":0.9357743263244629},{"id":"https://openalex.org/C2780892065","wikidata":"https://www.wikidata.org/wiki/Q184755","display_name":"Phytoplankton","level":3,"score":0.7842767238616943},{"id":"https://openalex.org/C69661492","wikidata":"https://www.wikidata.org/wiki/Q1447141","display_name":"Transect","level":2,"score":0.7833682298660278},{"id":"https://openalex.org/C111368507","wikidata":"https://www.wikidata.org/wiki/Q43518","display_name":"Oceanography","level":1,"score":0.7565334439277649},{"id":"https://openalex.org/C39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","level":0,"score":0.7031180262565613},{"id":"https://openalex.org/C136996986","wikidata":"https://www.wikidata.org/wiki/Q42967","display_name":"Monsoon","level":2,"score":0.7015098333358765},{"id":"https://openalex.org/C129513315","wikidata":"https://www.wikidata.org/wiki/Q179615","display_name":"Salinity","level":2,"score":0.6410355567932129},{"id":"https://openalex.org/C115540264","wikidata":"https://www.wikidata.org/wiki/Q2945560","display_name":"Biomass (ecology)","level":2,"score":0.6388020515441895},{"id":"https://openalex.org/C2778902199","wikidata":"https://www.wikidata.org/wiki/Q133878","display_name":"Chlorophyll a","level":2,"score":0.633089542388916},{"id":"https://openalex.org/C142796444","wikidata":"https://www.wikidata.org/wiki/Q181394","display_name":"Nutrient","level":2,"score":0.630134105682373},{"id":"https://openalex.org/C204983608","wikidata":"https://www.wikidata.org/wiki/Q2111958","display_name":"Productivity","level":2,"score":0.4849427044391632},{"id":"https://openalex.org/C125403950","wikidata":"https://www.wikidata.org/wiki/Q2111082","display_name":"Seasonality","level":2,"score":0.44570717215538025},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.18913611769676208},{"id":"https://openalex.org/C18903297","wikidata":"https://www.wikidata.org/wiki/Q7150","display_name":"Ecology","level":1,"score":0.16070932149887085},{"id":"https://openalex.org/C86803240","wikidata":"https://www.wikidata.org/wiki/Q420","display_name":"Biology","level":0,"score":0.14004221558570862},{"id":"https://openalex.org/C59822182","wikidata":"https://www.wikidata.org/wiki/Q441","display_name":"Botany","level":1,"score":0.058691322803497314},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.0},{"id":"https://openalex.org/C139719470","wikidata":"https://www.wikidata.org/wiki/Q39680","display_name":"Macroeconomics","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.4314/wiojms.si2020.1.3","doi":"https://doi.org/10.4314/wiojms.si2020.1.3","is_oa":true,"landing_page_url":"https://doi.org/10.4314/wiojms.si2020.1.3","pdf_url":"https://www.ajol.info/index.php/wiojms/article/download/174215/192282","source":{"id":"https://openalex.org/S4210212756","display_name":"Western Indian Ocean Journal of Marine Science","issn_l":"0856-860X","issn":["0856-860X","2683-6416"],"is_oa":true,"is_in_doaj":true,"is_core":false,"listed_in":["doaj","jpps-3","norway-1"],"host_organization":"https://openalex.org/P4310321518","host_organization_name":"African Journals OnLine","host_organization_lineage":["https://openalex.org/P4310321518"],"host_organization_lineage_names":["African Journals OnLine"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Western Indian Ocean Journal of Marine Science","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.4314/wiojms.si2020.1.3","doi":"https://doi.org/10.4314/wiojms.si2020.1.3","is_oa":true,"landing_page_url":"https://doi.org/10.4314/wiojms.si2020.1.3","pdf_url":"https://www.ajol.info/index.php/wiojms/article/download/174215/192282","source":{"id":"https://openalex.org/S4210212756","display_name":"Western Indian Ocean Journal of Marine Science","issn_l":"0856-860X","issn":["0856-860X","2683-6416"],"is_oa":true,"is_in_doaj":true,"is_core":false,"listed_in":["doaj","jpps-3","norway-1"],"host_organization":"https://openalex.org/P4310321518","host_organization_name":"African Journals OnLine","host_organization_lineage":["https://openalex.org/P4310321518"],"host_organization_lineage_names":["African Journals OnLine"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Western Indian Ocean Journal of Marine Science","raw_type":"journal-article"},"sustainable_development_goals":[{"display_name":"Life below water","id":"https://metadata.un.org/sdg/14","score":1.0},{"display_name":"Climate action","id":"https://metadata.un.org/sdg/13","score":0.4399999976158142}],"study_designs":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320313897","display_name":"University of Dar es Salaam","ror":"https://ror.org/0479aed98"},{"id":"https://openalex.org/F4320325629","display_name":"Western Indian Ocean Marine Science Association","ror":"https://ror.org/01xnrs054"}],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W3130782858.pdf","grobid_xml":"https://content.openalex.org/works/W3130782858.grobid-xml"},"referenced_works_count":32,"referenced_works":["https://openalex.org/W292519251","https://openalex.org/W395954396","https://openalex.org/W1484880536","https://openalex.org/W1810028515","https://openalex.org/W1975062309","https://openalex.org/W1992857472","https://openalex.org/W2017976444","https://openalex.org/W2025004638","https://openalex.org/W2040181012","https://openalex.org/W2058766067","https://openalex.org/W2074345804","https://openalex.org/W2098828870","https://openalex.org/W2141203769","https://openalex.org/W2157856445","https://openalex.org/W2165813914","https://openalex.org/W2167705142","https://openalex.org/W2168113371","https://openalex.org/W2172928335","https://openalex.org/W2181790573","https://openalex.org/W2198817353","https://openalex.org/W2215588194","https://openalex.org/W2282851460","https://openalex.org/W2582743722","https://openalex.org/W2586598129","https://openalex.org/W2594272637","https://openalex.org/W2904404231","https://openalex.org/W2907185173","https://openalex.org/W2990398577","https://openalex.org/W3207422976","https://openalex.org/W4392145873","https://openalex.org/W4399576166","https://openalex.org/W4399648969"],"related_works":["https://openalex.org/W4220784407","https://openalex.org/W3111741109","https://openalex.org/W2028736842","https://openalex.org/W7221789580","https://openalex.org/W7206156136","https://openalex.org/W2148006733","https://openalex.org/W2117391424","https://openalex.org/W2088374811","https://openalex.org/W2162871569","https://openalex.org/W7097416221"],"abstract_inverted_index":{"This":[0],"study":[1],"was":[2,44,63,69],"conducted":[3],"in":[4,11,23,143,148],"the":[5,66,73,83,100,106,128,140,146],"Pemba":[6],"Channel":[7],"off":[8,28],"Tanga":[9],"Region":[10],"northern":[12],"Tanzania":[13],"to":[14,82,105,139],"investigate":[15],"physical":[16],"and":[17,31,58],"chemical":[18],"factors":[19],"that":[20,65,118],"drive":[21],"changes":[22],"phytoplankton":[24],"biomass.":[25],"Three":[26],"transects":[27],"Mwaboza,":[29],"Vyeru":[30],"Sahare":[32],"were":[33,40,60],"selected.":[34],"For":[35],"each":[36],"transect,":[37],"ten":[38],"stations":[39],"sampled.":[41],"Phytoplankton":[42],"biomass":[43],"determined":[45],"as":[46,80],"chlorophyll-a":[47],"(Chl-a)":[48],"concentration.":[49,150],"Similarly,":[50],"physico-chemical":[51],"variables":[52],"(temperature,":[53],"salinity,":[54],"dissolved":[55],"oxygen,":[56],"pH":[57],"nutrients)":[59],"determined.":[61],"It":[62,115],"observed":[64,122],"Chl-a":[67,149],"concentration":[68],"significantly":[70],"higher":[71,97],"during":[72,99,127],"northeast":[74,101,129],"monsoon":[75,85,102,130],"(median":[76,86],"1.44":[77],"mg":[78,88],"m-3)":[79],"compared":[81],"southeast":[84],"1.19":[87],"m-3;":[89],"W":[90],"=":[91,94],"2216,":[92],"p":[93],"0.029).":[95],"The":[96],"productivity":[98],"is":[103,116],"attributed":[104],"presence":[107],"of":[108,120],"high-nutrient":[109],"water":[110],"caused":[111],"by":[112],"coastal":[113],"upwelling.":[114],"concluded":[117],"indication":[119],"upwelling,":[121],"through":[123],"relatively":[124],"low":[125],"temperatures":[126],"season,":[131],"could":[132],"be":[133],"responsible":[134],"for":[135],"bringing":[136],"nutrient-rich":[137],"waters":[138],"surface,":[141],"which":[142],"turn":[144],"stimulated":[145],"increase":[147]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":3},{"year":2023,"cited_by_count":2}],"updated_date":"2026-11-04T10:54:05.112534","created_date":"2021-03-01T00:00:00"}