Questions related to Zooplankton Ecology
I am a biology bachelor's student, and I'd love to try to learn how to conduct a small research project on my own.
Mapping out the copepoda species living in the sewers of Prague seems like an adequately difficult task for someone with my education and (close to zero) skill level.
It is my first time attempting to make a research project happen on my own, so I am looking for any kind of guidance or advice.
How would you approach such a task?
Do you think this is a good topic for research for someone who is a complete newbie?
Thank you very much.
Hello! Between mid-April and throughout June2017 we carried out an extensive sampling to estimate sea urchin settlers through collectors placed on the bottom floor along the Sinis Peninsula (Westcoast of Sardinia , Italy).
We placed 100 collectors at five metres depth, on rocky bottom and Posidonia oceanica meadows, inside and outside the Marine Protected Area of Sinis (according to the method described by Tomas F, Romero J, Turon X, 2004) to evaluate settlement and recruitment of sea urchin Paracentrotus lividus in two contrasting habitats in the Mediterranean (Marine Ecology Progress Series 282: 173-184). Altogether we collected about 500 samples kept at -20 deg. in 70% alcohol. Moreover, we characterized sampling stations calculating habitat and landscape metrics.
However we found many other species of organisms, especially polychaetes, molluscs, crustaceans, other echinoderms, etc.
At the moment we lack resources to perform taxonomic work on these communities.
We are happy to send over the samples to anyone who could be interested. Considering we do have all the environmental data metrics, it would be great to identify biodiversity hot spots in the study area once we have the taxonomic data.
If interested, please contact me at: email@example.com
For community studies like species succession, variation in composition, especially for plankton and benthos, what are the appropriate statistical methods? One such method is MDS with cluster overlay. Similarly what else can be applied for such studies?
I made a study on the effect of two factors (A & B) on a variable response Y (chlorophyll rate) in mesocosms. These treatments with two modalities (A1/A2 & B1/B2) were crossed to create four different treatments : A1_B1 / A2_B1 / A2_B1 / A2_B2.
And i made 3 replicates per treatment.
However the chlorophyll rate varied according others factors especially zooplankton communities.
Thus, i obtained a huge variability between each 3 replicates per treatment. And to reduce it, i was wondering if i could divided my chlorophyll rate by the total amount of zooplankton / or the amount of cladocerans because these are the communities that contribute most to the decrease in chlorophyll. (Or even just divided by the amount of daphnia because they were the more abundant cladocerans present in my study over the time). My idea is to reduce the variation of zooplankton communities between replicates and thus to reduce variability of chlorophyll per treatment to then be able to see the effect of my treatments on chlorophyll ?
I hope I am not too confused and thank you in advance for your help.
This small crustaceaen appeared in a zooplankton sample from a small reservoir in Costa Rica. Unfortunately we were not able to find it again to take a better picture. We would appreciate any hints about its identity.
The zooplankton net probably touched the bottom or the littoral zone before the hawling because the sample contained some organic debris, whcih could be observed to the left of the organim.
The zooplankton I had in mind specifically are copepods found in lake communities. From my research, I found that their presence can be a generally beneficial factor, mainly because they prevent harmful algal blooms.
working on sparids diet i'm looking for a site or link for identification of preys mainly:
-crustacean, annelids, fish, echinoderms, algae...etc
I have a preliminary names of all the organism that i found on the gut of freshwater fish i just need to verify this images. please help me because it is part of my thesis paper.
Samples were collected from a highly turbid river and contain much too much sediment for efficient taxonomic processing of individuals. Samples were filtered through a 75 micron mesh. Simply filtering the sample with a courser mesh net won't do, as we would lose too many small zooplankton.
Is there any good resource of ciliates that talks about species specific feeding habits (eg feeding type, trophic role, clearance rate)?
We have been monitoring a temperate lake during the winter and observing Daphnia under the ice, when normally they would not be found in the water column. Some of which still have asexual eggs. The system is hyper-eutrophic which is leading us to think perhaps food conditions still permit growth even though temperature is cold.
Has anyone else observed Daphnia in winter or under the ice in lakes? Thanks.
I am looking for your recommendations of trinocular microscopes to observe behavior (movement) of aquatic mesofauna / meiofauna in 6-, 8-, 12-, or 24-well plates.
And with preferably same scope observe internal morphological responses to chemical exposure.
I'm wondering if there is a published toxicokinetic model for D.magna (or similar organism) regarding hydrophobic contaminants like PCBs for example. I have a feeling there should but I can't seem to find it. Any tips are greatly appreciated.
To develop citizen science, we want test various safe methods to conserve zooplankton samples on sail or motor boats from couple of days to weeks, if possible not to much expensensive.
I had 3 data group. environmental data (Temperature, Oxygen, pH, EC and Turbidity), zooplankton community and growth rate of a fish. All data belonged to a one pool. Now I tried to find a best model to describe the relationship between number of zoopnaktons, environmental data and growth rate of the fish. what is best statistical method? Is GLM applicable?
Thanks for your help
Could anybody help me the name of the 2 zooplankton? or their family,or order?Anything will be helpful to me . Thank you so much. Additionally, if anybody need other photos on these two zooplankton, please message me.
The length of them are both ca. 5 mm.
Notes: the zooplankton1-1 whole body is nearly white color;
zooplankton2-13 former half body is nearly white color ,but the later half body is nearly pink color,approximately iron red color.
I am looking for studies about hyponeuston and in particular I would like to know if someone studied mesozooplankton in the surface waters (first 10-20 cm) of the Arctic.
We observed a shift from Kellicottia to Keratella along a trophic gradient (other studies have observed the same pattern). What mechanism can explan this shift?
Zooplankton are, by definition, drifters in the ocean. Therefore, they are often associated with different water masses and can be ideal indicators for assessing ecosystem status. More specifically, what can they really indicate, how do we incorporate zooplankton indicators into ecosystem assessment framework, and how these indicators can be used in marine policy?
I am talking about SW part of black sea coast. I think the sampling depth for the vertical hauls must be 0-10m - 10-20m. I do not know if it is a suitable depth for good sampling. I know that depth depends.
Concentrations of PCDD/F, DL-PCB and NDL-PCB are lower in zooplankton (primary consumers and lower-trophic-level invertebrates) than in phytoplankton (primary producers).
I’m interested in levels of these substances in zooplankton (e.g. copepods), especially from Mediterranean area. I found a few publications, some a bit dated.
In particular which concentrations can be considered of concern at this marine food web level?
These are copepod grazing experiments, where the particle size spectra and abundance were measured with a coulter counter particle counter in initial samples, and final control (no grazer) and treatment (with grazers) bottles.
This is a new area for me, any help is greatly appreciated.
I need to know if the strastigraphic range of the radiolarian species Belowea variabilis WON is exclusively Carboniferous or could extend to the Middle/Late Devonian?
I'm working on latitudinal diversity gradients in these taxa (copepods and cladoceran) and would like to know if it is safe to assume that speciation events have little effect on current diversity patterns in zooplankton across Canada.
I found this sample(which is attached) along with the phytoplankton samples collected. Suggest me weather its a kind of plankton or some other thing. If its a plankton help me to identify its name.
Every September since 2003, students in my senior class in freshwater ecology take net plankton samples from deep, soft-water Lochaber Lake, Nova Scotia, Canada. The lake is undergoing a transition to a more productive condition, characterized by intense blooms of Microcystis aeruginosa.
This year, students observed oblong, red inclusions within the bodies of copepod nauplii from the lake. I have not seen these before and I have no idea what they are. There were as many as 6 within the body of one copepod. You can see a couple of low-resolution photographs on my web site at http://people.stfx.ca/btaylor/WebPage/Barry%20Taylor.htm. Are these bodies familiar to anyone?
Recently, I downloaded ZooImage software for image analysis of freshwater zooplanktons. I want to know if anybody has used this software and whether this zooImage software is reliable ?
I'm looking for studies or simple nutritional profiles on live, powder form, and concentrate versions of phytoplankton. To further study the effects on feeding copepod cultures that are feed those versions of phytoplankton.
I am working on freshwater zooplankton so I would be very grateful if somebody could give me some idea for using the best stain in identifying freshwater zooplanktons.
Am working on freshwater zooplanktons. So I want to have some idea about the preparation of zooplankton samples for SEM.
We found zooplankton species richness increasing whereas abundance and biomass were decreasing. Have you seen something similar and what could be the reason?
Any references and explanation would be helpful. The research area is very shallow water in brackish-water Baltic Sea.
My zooplankton samples occasionally contain masses of chain forming diatoms (also organic material) that are virtually impossible to remove from the sample before being subjected to the biomass determination process (gravimetrically, dry weight). I am seeking advice on methods to be used for separating, to some degree at the least, this non-zooplankton component, other than by way of manually picking. The latter method, however effective, is due to time constraints, not a viable option for this particular programme. Any advice given will greatly be appreciated.
Is there a distinct morphological difference between Megacyclops viridis and Acanthocyclops robustus? Is it possible to be observed A. robustus with very very rounded cephalothorax like M.viridis.
I need to find the main variables in the ecological and morphological phenotypes of marine zooplankton which define the trophic niche I order to build a comparative multivariate matrix.
I am looking for reliable datasource for various microzooplankton taxa. I am focused on North Baltic Sea microzooplankton but any other source would be welcome as well.
We know from the manual that after getting the zooplankton samples from Net, It is needed to filter the samples to remove the salt by distilled water, However, there is no detail method to filter the samples for POC treatment. For example, what kind of seives or filters (GF/F) are used for filtering? what kind of cases were used to transfer these wet samples to oven for drying? How long it will take for the drying? What is the temperature we should keep?
I have 5 sampling sites (throughout the estuary, a small one), and a 8 yrs time-series.
My question concerns the effects of seasons vs year-to-year variability.
Can I apply a PCA in a matrix 8 yrs (annual average of the 5 sites) x 23 plankton indicators ( were selected based on functional groups, dominance of the taxa sampled, appearance of the seasonal peak, representativeness for each sampling site). For example :
Nauplii cirripedia summer and spring
Nauplii cirripedia spring
Marine cladocerans autumn and summer