Talk:Sacramento–San Joaquin River Delta

message: "dirty levees" ?
Is that supposed to be "earthen levees" ?
Sacramento River Delta? It's called the California Delta or the San Joaquin-Sacramento River Delta, you self vanitated morons.
This should be revamped so as to include a discussion of the current crisis regarding possible levee failure. Elijahmeeks 03:55, 14 March 2006 (UTC)
replies: text: "Self vanitated morons?" That's a little harsh. I will add a section about the possible levee faliures aslong as you don't call me a moron.  Rayana fazli 22:33, 16 March 2006 (UTC)
replies: text: "Vanitate" isn't a word. 96.254.62.85 (talk) 09:03, 5 May 2014 (UTC)
replies: text: It is now!!! Ohh yeah. jp×g 04:53, 2 October 2020 (UTC)
thread_title: Comments

message: I removed the following, which: 1) was without sources 2) was poorly written 3) used unscientific vocabulary. David.Monniaux 01:33, 28 March 2006 (UTC)
thread_title: Removed unsourced content

message: I agree with Elijahmeeks, I want, no, request that the goddammed article be renamed "California Delta". Thats the right name. Two rivers (when you look at it, the SJ is only a miles shorter than the Sacramento) both the largest in CA flow to meet together into the SF Bay, does Sacatomatoes need their name on everything?? Man, seriously. You know what, someone should write a better article under "California Delta", and get the current one erased or combined.
-Sincerely
Abe
: I partially disagree.  I'm a civil engineer working for the State of California and for the past seven years I've been an expert in the "Sacramento-San Joaquin Delta" (in fact, I am the editor of one of the references cited in the current version of this report -- actually I also happened to be the author of that particular chapter as well).  That is both its common and legal name.  In the Sacramento region it will often also be called "the Delta", but we have to remember that Wikipedia isn't just about California for Californians.  An English speaker in Australia might think of some other delta as "the Delta", and thus I honestly think the name of the article is fine.  IIRC there are redirects for some other names to this article, and I would not object to you creating a "California Delta" redirect to this article, because there is no other large Delta in California.  If anything the articles official name should be "Sacramento-San Joaquin Delta". MCalamari 15:36, 20 September 2006 (UTC)
thread_title:  No really 

message: Add "* Support" or "* Oppose" or other opinion in the appropriate section followed by a brief explanation, then sign your opinion with ~~~~
*Support - compare  with . --NE2 16:16, 21 February 2007 (UTC)
thread_title:  Survey 

message: An increasing issue in the delta is the Delta smelt, but this hasn't been mentioned at all in the article. Could someone look at this? (written by User:Zenazn, who was too lazy to log on)
:I am working on a contribution to this article.  It may take a month.  See my first installment -- the Flooded Ponds and Water Management sections of Suisun Marsh.
:HowardMorland 03:21, 10 October 2007 (UTC)
thread_title: Delta Smelt

message: Is a false river another name for the delta? It certainly appears like a real river or rivers, it's not like an oxbow lake or anything like that. Slightnostalgia (talk) 10:38, 17 June 2015 (UTC)
thread_title:  Redirected from False River, California 

message: Hello fellow Wikipedians,
I have just added archive links to  on Sacramento–San Joaquin River Delta. Please take a moment to review my edit. If necessary, add  after the link to keep me from modifying it. Alternatively, you can add  to keep me off the page altogether. I made the following changes:
*Added archive https://web.archive.org/20130310052106/http://www.restorethedelta.org/about-the-delta/overview-of-delta-agriculture/ to http://www.restorethedelta.org/about-the-delta/overview-of-delta-agriculture/
*Added archive https://web.archive.org/20121023065538/http://www.deltawaterfowl.org/media/pr/2012/120703-BPOP.php to http://www.deltawaterfowl.org/media/pr/2012/120703-BPOP.php
*Added archive https://web.archive.org/20140720184633/http://www.coastal.ca.gov/ccbn/keep_the_delta_clean.html to http://www.coastal.ca.gov/ccbn/keep_the_delta_clean.html
When you have finished reviewing my changes, please set the checked parameter below to true to let others know.
Cheers.—cyberbot IITalk to my owner:Online 01:49, 10 February 2016 (UTC)
thread_title:  External links modified 

message: There's a lot of water transportation of cars, steel, naval supplies, etc. I think we should find a good source for that and break "Water transportation" or "Shipping" out from under "Agriculture" in the Economy and Uses section. Chris vLS (talk) 01:01, 25 November 2018 (UTC)
replies: text: I have added a new section header 'transportation' which could cover both. Richard 09:35, 26 November 2018 (UTC)
thread_title:  Proposal to break out water transportation 

message: I propose to merge Sacramento-San Joaquin Delta National Heritage Area into Sacramento–San Joaquin River Delta. The NHA article is a stub, and can't really be expanded without just duplicating the excellent work on Sacramento–San Joaquin River Delta. My suggestion is to add  to the intro, and  (with its refs) to the Conservation efforts section. Feedback? Schazjmd (talk) 16:26, 4 May 2019 (UTC)
thread_title:  Merger proposal 

message: Proposal to add the following information detailing toxic cyanobacteria outbreaks in the Delta. — Preceding unsigned comment added by Mbreuerco (talk • contribs) 
The Delta has seen numerous cyanobacteria blooms with increasing frequency over the past two decades.Lehman, P.W., Marr, K., Boyer, G.L., Acuna, S., and Teh, S.J. (2013) Long-term trends and causal factors associated with Microcystis abundance and toxicity in San Francisco Estuary and implications for climate change impacts. Hydrobiologia 718: 141-158. Cyanobacteria have the potential to produce cyanotoxins which can pose a risk to humans and animals upon contact.Mankiewicz-Boczek, Joanna & WALTER, ZOFIA & Zalewski, Maciej & Konopnickiej, M.. (2002). Natural toxins from cyanobacteria. Acta Biol. Cracov Bot. 45.  Because of this cyanobacteria blooms are seen as a threat that has the potential to impact human life.  Several types of toxic cyanobacteria have appeared in the Delta, with Microcystis aeruginosa being one of the most common types.  Microcystis aeruginosa produce microcystins which are hepatotoxins that can cause liver cancer.Zegura, Bojana & Sedmak, Bojan & Filipic, Metka. (2003). Microcystin-LR induces oxidative DNA damage in human hepatoma cell line HepG2. Toxicon : official journal of the International Society on Toxinology. 41. 41-8. 10.1016/S0041-0101(02)00207-6.   Frequent Microcystis blooms have impacted the food web of the Delta at multiple trophic levels.  Microcystis spp. blooms in the Delta were found to decrease the diversity of the aquatic microbial community.Otten, T.G., Paerl, H.W., Dreher, T.W., Kimmerer, W.J. and Parker, A.E. (2017), The molecular ecology of Microcystis sp. blooms in the San Francisco Estuary. Environ Microbiol, 19: 3619-3637. doi:10.1111/1462-2920.13860 Additionally, the cyanobacteria blooms in the Delta have led to decreased zooplankton mass and density. Stringfellow, William. (2013). Unprecedented Bloom of Toxin-Producing Cyanobacteria in the Southern Bay-Delta Estuary and its Potential Negative Impact on the Aquatic Food-Web (Report 4.5.1). 10.13140/RG.2.1.3730.3768.  There is also concern for further spread throughout the food web via bioaccumulation.  Microcystins were detected in the tissue of clams at levels much higher than the ambient water around them because of microcystin's ability to covalently bind to tissue.Bolotaolo M, Kurobe T, Puschner B, et al. Analysis of Covalently Bound Microcystins in Sediments and Clam Tissue in the Sacramento-San Joaquin River Delta, California, USA. Toxins (Basel). 2020;12(3):178. Published 2020 Mar 13. doi:10.3390/toxins12030178
The increased occurrences of cyanobacteria blooms in the Delta can be attributed to a variety of factors with the most important being lowered streamflow. From 2004 through 2008 researchers collected different water quality parameters during the cyanobacteria blooms and determined that the blooms appeared after reaching a threshold of 19°C (66°F) which was exacerbated by reduced precipitation, reduced streamflow, and increased nutrient concentrations. They also determined that the negative attributes associated with climate change like reduced precipitation and increased temperatures could further increase the possibility of cyanobacteria blooms in the Delta.  The high prevalence of nutrient concentrations in the Delta also plays a significant part in the increased frequency of Microcystis aeruginosa blooms.Mioni, Cecile & Kudela, Raphael & Baxa, Dolores. (2011). Harmful cyanobacteria blooms and their toxins in Clear Lake and the Sacramento-San Joaquin Delta (California). Report Prepared for Central Valley Regional Water Quality Control Board.   Microcystis benefits greatly from anthropogenic inputs of nitrogen which allows it to out-compete other primary producers and dominate the lower trophic levels.Noriko Takamura, Toshio Iwakuma, Masayuki Yasuno, Uptake of 13 C and 15 N (ammonium, nitrate and urea) by Microcystis in Lake Kasumigaura , Journal of Plankton Research, Volume 9, Issue 1, 1987, Pages 151–165, https://doi.org/10.1093/plankt/9.1.151 There have also been large amounts of nutrients monitored in the Delta as a result of various human activities.Kraus, T.E.C., Bergamaschi, B.A., and Downing, B.D., 2017, An introduction to high-frequency nutrient and biogeochemical monitoring for the Sacramento–San Joaquin Delta, northern California: U.S. Geological Survey Scientific Investigations Report 2017–5071, 41 p., https://doi.org/10.3133/sir20175071
The increased presence of Microcystis aeruginosa blooms in the Delta represents a continual threat for species at multiple trophic levels.  The lower trophic levels are affected from both reduced diversity as well as reduced numbers through competition. When the conditions are met Microcystis have the ability to dominate the lower trophic levels hence why they are able to bloom. Additionally, when microcystins are present in the system then the consumers in the food web are at risk due to the effects of bioaccumulation.  Fish that are present and active during cyanobacteria blooms can often have microcystin levels high enough to produce sublethal effects.Berg M and Sutula M. 2015. Factors affecting the growth of cyanobacteria with special emphasis on the Sacramento-San Joaquin Delta. Southern California Coastal Water Research Project, Technical Report 869 August 2015. Because microcystins can concentrate inside fish at multiple trophic levels it also represents a risk for human consumption as well.  
The Delta has seen numerous cyanobacteria blooms with increasing frequency over the past two decades. Cyanobacteria have the potential to produce cyanotoxins which can pose a risk to humans and animals upon contact. Because of this cyanobacteria blooms are seen as a threat that has the potential to impact human life.  Several types of toxic cyanobacteria have appeared in the Delta, with Microcystis aeruginosa being one of the most common types.  Microcystis aeruginosa produce microcystins which are hepatotoxins that can cause liver cancer.  Frequent Microcystis blooms have impacted the food web of the Delta at multiple trophic levels.  Microcystis spp. blooms in the Delta were found to decrease the diversity of the aquatic microbial community. Additionally, the cyanobacteria blooms in the Delta have led to decreased zooplankton mass and density.  There is also concern for further spread throughout the food web via bioaccumulation.  Microcystins were detected in the tissue of clams at levels much higher than the ambient water around them because of microcystin's ability to covalently bind to tissue.
:You've already added the content to the article, and have since tried to remove it twice. What's going on? Schazjmd (talk) 20:42, 10 December 2020 (UTC)
thread_title:  Toxic Cyanobacteria