Harmful Algae News (HAN) is an IOC (UNESCO) newsletter created to respond to the expressed wishes of participants in several IOC workshops on harmful algal blooms, in particular the IOC-SCOR Workshop in Newport, Rhode Island (USA), 2-3 November 1991. Its purpose is to disseminate information on harmful algal events and on research results as well as to announce research and management programmes, conferences, meetings etc. The initial address list included all the participants in the V International Conference on Harmful Algal Blooms. Nowadays, HAN has more than 2000 subscribers.
HARMFUL ALGAE NEWS No. 61 now online @ http://www.e-pages.dk/ku/1401/
Visit the ISSHA webpage for more resources on Harmful Algae.
A brief summary about the role of climate change on algae blooms written for the general public, is published by Climate Central.
“Algae occur naturally in most bodies of freshwater and saltwater. It’s normally fairly harmless, but the right combination of warm water, high nutrient levels, and adequate sunlight combined can cause a harmful algae bloom. These blooms can damage aquatic ecosystems by blocking sunlight and depleting oxygen that other organisms need to survive. Some algae, like red algae and blue-green algae, can produce toxins that damage the human nervous system and the liver (and they also stink — literally)………..”
Read the report here.
The North Central Region Water Network organizes a webinar titled “Understanding, Tracking, and Predicting Harmful Algal Blooms”.
Harmful Algal Blooms (HABs) can have serious repercussions for animal and human health. Their increasing presence has been linked to multiple events such as nutrient runoff, climate change, invasive species, and disturbed ecosystems. This webinar will look at what researchers are currently doing to predict when these blooms might occur; how these blooms are affecting inland waters and the Great Lakes; and how stakeholders and citizens are helping scientists track these harmful algal blooms.
Many thanks to Dr. Lesley D’Anglada for sharing this information through the US EPA Freshwater HABs Newsletter.
From the abstract of a recent paper by Anat Lodin-Friedman and Shmuel Carmeli, published in Marine Drugs:
“During blooms, cyanobacteria produce diverse modified peptides. Among these are the microginins, which inhibit zinc-containing metalloproteases. Ten microginins, microginins KR767 (1), KR801(2), KR835 (3), KR785 (4), KR604 (5), KR638 (6), KR781 (7), KR815 (8), FR3 (9), and FR4 (10), were isolated from the extract of a bloom material of Microcystis sp. (IL-405) collected from the Kishon Reservoir, Israel in the fall of 2009. The structures of the pure compounds were elucidated using 1D and 2D NMR techniques and high-resolution mass spectrometry. The absolute configuration of the chiral centers of the amino acids were determined by Marfey’s and advance Marfey’s methods and by comparison of 1H and 13C NMR chemical shifts of the Ahda derivatives with those of known microginins. These microginins differ in sequence and absolute configuration of the chiral centers of the Ahda moieties and by N-methylation of the Ahda amine group and extent of chlorination of the Ahda terminal methyl group. The compounds were evaluated for inhibition of the zinc metalloprotease, aminopeptidase M, and exhibited low- to sub-nanomolar half maximal inhibitory concentration (IC50) values”.
Lodin-Friedman, A.; Carmeli, S. Microginins from a Microcystis sp. Bloom Material Collected from the Kishon Reservoir, Israel. Mar. Drugs 2018, 16, 78. https://doi.org/10.3390/md16030078
The May 2018 issue of the US EPA Freshwater HABs Newsletter is published.
It features, among others, a list of tools and resources for the HABs season. The list of resources is useful for drinking water supplies, bathing water authorities and the general public.
You can download the newsletter here.
For subscription to the newsletter, comments, feedback or additional information, you can contact Lesley D’Anglada.
The US EPA Freshwater Newsletter – April 2018 issue is available at the EPA website.
You can subscribe to this Newsletter by sending an e-mail to the editor, Dr. Lesley V. D’ Anglada.
A Session on Taxonomy is organized by Nico SALMASO (IASMA-FMACH, Italy), Mitsunori IWATAKI (Univ. Tokyo, Japan) and Nicolas CHOMERAT (Ifremer, France), within ICHA2018 in Nantes (21 to 26 October 2018).
The taxonomy session will focus on recent advances in taxonomy and systematics of harmful algae and cyanobacteria. This will include characterization of new taxa, proposal of nomenclatural changes due to reinvestigations using molecular and phenotypic methods, molecular phylogeny, and studies of the genetic diversity of toxic species.
The deadline for abstract submission is 15 April 2018 !!!
See the list of session topics of ICHA2018.