Book Review: A Catalogue of Phytoplankton from the Mexican CentralPacific (in Spanish) Authors: Hernández-Becerril, D.U., Barón-Campis, S.A., Ceballos-Corona, J.G.A., Alonso-Rodríguez, R., RinconesReyes, K.M., Becerra-Reynoso, R.T. & Arce-Rocha, G. 2021. Catálogo de fitoplancton del Pacífico central mexicano. Cruceros MareaR (2009-2019). B/O El Puma. Universidad Nacional Autónoma de México. 254 pp. ISBN 978607-30-4944-3 Our knowledge of the marine phytoplankton shows a strong bias towards the coastal areas of temperate seas, where the monitoring programs are mainly focused on harmful species. Consequently, there is a deficit of information on the phytoplankton of warm seas, and especially from the open ocean. Within the context of climate change, where tropical species expand their ranges of distribution, the biodiversity in warm seas requires more attention. However, we often only have the option of consulting classical monographs for each major taxonomical group (diatoms, dinoflagellates, coccolithophorids, etc.) with illustrations based only on-line drawings, and the nomenclature and classification is not updated. Fortunately, this new book contributes to filling this deficit providing an essential guide for phytoplanktologists, not only working on warm regions, but also in temperate waters because numerous species have wide ranges of distribution. This book compiles the observations from research cruises carried out during 10 consecutive years in the Mexican Pacific. The transects were perpendicular to the coast, allowing, in addition to the oceanic species, to show the diversity of neritic species (i.e., Alexandrium). The authors combine net and bottle samplings, as well as different preservation methods, which allows a wide representation of phytoplankton, from the rarest species, to species with special preservation requirements such as coccolithophorids. We will find an underestimation of some groups such as the naked dinoflagellates, but this is inevitable because these fragile or16 ganisms are lost or distorted with the sample preservation. The result is a complete guide for the identification of warm-water phytoplankton, and also essential for phytoplanktologists working on temperate waters showing a trend to the tropicalization. The text and micrographs reported 501 taxa: 257 dinoflagellate species, 195 dinoflagellate species, 35 coccolithophorids, and other groups. This is a record of the current species composition present in the region, and an essential tool to evaluate the future changes of biodiversity. The organization of the text, especially the combination of photographs from both optical and electron microscopy arranged in plates grouping the taxa based on their similarity, with distinct views of the individuals, allow comparisons. The high number of species included is remarkable which guarantees that in most of the cases the user will find the information required. Phytoplankton is characterized by its extraordinary diversity, and phytoplanktologists are used to consulting bibliography from different sources and languages. The use of Spanish as language is not a handicap, and the profusion of photographs makes it a useful guide for any user regardless the language. This is a textbook for the phytoplankton identification courses organized by the authors, and the extensive glossary solves for the Spanish-speaking community any doubts on translation of the terminology to describe morphological characters. This is an essential resource for any person interested in marine phytoplankton, and it should be in every library that serves students and researchers in marine biology. Future editions are expected with additional information, including updated new records, and it is expected an extension with records from the Gulf of Mexico and the Caribbean Sea. The authors are commended for this effort in compiling their observations that facilitate the work of the identification and the formation of the phytoplankton observers. Such a comprehensive study is the result of a joint effort led by Prof. Hernández-Becerril, who together with Prof. Rosalba Alonso, have largely contributed to the formation of a high num bers of phytoplankton experts that participate as co-authors, and also students that collaborate in the samplings and observations. Prof. Hernández-Becerril is one of the largest contributors to the knowledge of the biodiversity of warm-water phytoplankton in recent decades. His expertise with numerous taxonomical innovations (Neocalyptrella, Proboscia, etc.) is reflected in the extraordinary representation of typical warm-water genera such as Asteromphalus, but also other genera with a complex distinction of the species such as Coscinodiscus, Chaetoceros or Thalassiosira. Thecate dinoflagellates are largely represented with genera Protoperidinium or Tripos, but it is remarkable the high diversity of Dinophysales, a group where Prof. Hernandez-Becerril and his co-workers have proposed numerous taxonomic innovations. An effort was made to differentiate species that that many of us would simply pooled as Phalacroma cf. rotundatum. Two new combinations of little known dinophysoid dinoflagellates, Phalacroma tailisunii comb. nov. and P. cyrtop tera comb. nov. are proposed. Authors Fernando Gómez, Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy Email corresponding author: fernando.gomez@fitoplancton.com HARMFUL ALGAE NEWS NO. 69 / 20221 Harmful Algae News An IOC Newsletter on Toxic Algae and Algal Blooms No. 69 - February 2022 https://hab.ioc-unesco.org/ The 19th (1st Virtual) International Conference on Harmful Algae hosted from Mexico The 19th International Conference on Harmful Algae (19 ICHA), was held in a virtual format for Lobby of the virtual ICHA 2021 costs to attend the meeting. The Conference started with two pre-conference sessions of the Young Investigator Networking Session coordinated by Lorena Durán, Carlos Rodríguez, Philipp Hess, and Harry Nelson. Previously, Lorena Durán and Carlos Rodríguez interviewed o The Mexican scientists comprising the Local Organizing Committee special sessions held live on Zoom that covered breakthrough topics on harmful algae from marine and freshwater environments: HAB Early Warning Systems Session, Impacts of HABs on fish farms: Addressing industry and global insurance n Scientific Highlights of the 19th International Conference on Harmful Algae Summarizing all of the science from a conference is a huge and perhaps impossible task, but once done, it can serve as a reference for the future. We had five exciting and intensive virtual conference days where all the late predatorial protists, viruses, and bacteria (Alexandra Worden). Several plenary talks highlighted insights on HAB management, including emergent management strategies for monitoring, biotoxin detection, and human health risks associated with Ciguatera Poisoning (Marie-Yasmine Dechraoui Bottein); com Fig. 2. Long-term history of HABs off Eastern Tasmania, Australia, using sedimentary DNA (courtesy of Linda Armbrecht) French Mediterranean and a French Atlantic K. veneficum strain induced over 50% loss of cell viability. A high level of intra-specific variability of ichthyotoxic activity was obse pacificum and Durusdinium trenchii) to be successfully frozen and revived with high viability (Joseph Kihika). This highlights the potential to have a microalgae diversity bank in the future. Several presentations were focused on the intimate association between hosts and their microbiomes (Chri Fig. 4. Example from a weekly HAB bulletin reporting HAB events along the Irish coast (courtesy of Dave Clarke) harvested along the coast. Analysis of seawater and oyster samples confirmed high levels of PSP toxins (Margarita Fernández-Tejedor). The design, implementation, and contents of HAB bulle for lake ecosystem services and selection of environmental measures together with local farmers, which may reduce overall costs (Claudia Wiegand). A special session on the new WHO book Toxic cyanobacteria in water provided advice and guidelines for the management of freshwater cyanobacterial blooms, ISSHA's Corner The International Society for the Study of Harmful Algae (ISSHA) convened the 19th (1st Digital) International Conference on Harmful Algae (19 ICHA), held in La Paz, México, from 10th to 15th October 2021. The ISSHA Council had monthly meetings on-line between May and October to plan molecular probes targeting HAB species (including their different life cycle stages), difficult to identify with conventional microscopy methods. More information about Lindas biography and publications can be found here. Nomination letter of Linda Medlin to the ISSHA Council There are many, many re waters of the South China Sea, a marginal sea of the Western Pacific (Teng et al. 2013, 2014). Sing Tung Teng has demonstrated his training and dissemination skills by introducing a taxonomic grouping of Pseudo-nitzschia based on frustule morphology, which eventually developed into an interactive ke from some species of Rhodophyta to the cultures significantly enhanced the growth of the two Gambierdiscus species that occur in Japan. He is now starting an investigation to clarify the effect of bacteria on Gambierdiscus growth in an attempt to elucidate the growth characteristics of Gambierdiscus ISSHA President goodbye Dear ISSHA members: As many of you know, at the general glection held prior to the International Conference on Harmful Algae (ICHA2021) from 11-15 October 2021 (La Paz, Mexico), I stepped down as the president of the International Society for the Study of Harmful Algae (ISSHA UNESCO Taxonomic Reference List of Harmful Micro Algae Editors Workshop 2021 On November 18-19th 2021, the nine thematic editors responsible for the UNESCO Taxonomic Reference List of Harmful Micro Algae and Henrik Enevoldsen from IOC-UNESCO gathered together in a hybrid format workshop, to discuss Book Review: A Catalogue of Phytoplankton from the Mexican CentralPacific (in Spanish) Authors: Hernández-Becerril, D.U., Barón-Campis, S.A., Ceballos-Corona, J.G.A., Alonso-Rodríguez, R., RinconesReyes, K.M., Becerra-Reynoso, R.T. & Arce-Rocha, G. 2021. Catálogo de fitoplancton del Pacífico central Forthcoming Events 2022 UN Ocean Conference GLOBAL ONLINE STAKEHOLDER CONSULTATION Inputs to concept papers of interactive dialogues Contribute your inputs to the concept papers of the interactive dialogues for the 2022 UN Ocean Conference! (see back page) Deadline: 21 February 2022 Contribute your GlobalHAB symposium on automated in situ observations of plankton Aims and background Harmful Algal Blooms (HABs) are affecting aquatic ecosystems and human societies. Biotoxin-producing HABs species and species causing fish mortalities are problems for aquaculture, fisheries and also for tourism. H www.neiwpcc.org/events/ushab11 #USHAB2022 For logo contest rules, please visit our conference website. We are pleased to announce that the 11th U.S. Symposium on Harmful Algae will be held on October 23-28, 2022 in Albany, New York, at the Hilton Albany. Local coordination is being led by NEIWPCC, Eds-in-chief Beatriz Reguera, IEO (CSIC), Vigo, Spain Eileen Bresnan, Marine Scotland, UK Regional Editors Caribbean: Ernesto Mancera jemancerap@unal.edu.co Atlantic Europe: Maud Lemoine Maud.Lemoine@ifremer.fr Mediterranean Sea: Adriana Zingone zingone@szn.it India: K.B. Padmakumar kbpadmakumar