Do you know any study on the vegetative regeneration of Qurcus suber from root sprouts? Is it a usual method of multiplication in its natural habitat?

For classification of vegetation habitats in the intertidal zone of the waddensea area in Northern Germany I need a reliable tool to identify seagrass and other vegetation. The basic approach is to work only on those scenes with low tide and then to use the NDVI. Unfortunately the results are not satisfying, supposedly because there's still too much humidity/water within the wadden soil.

Hi, I am looking for a web database to download the habitats inhabited by a list of plant species distributed across the world. I have visited the IUCN and International Vegetation Classification databases, but they seem very incomplete. The goal is to collect the various habitats ('habitat' as specific as possible, e.g distinguishing calcareous grasslands from other grasslands) inhabited by a list of plant species. Thanks!

I have collected habitat and presence data, single-season modelling of 54 sites for a fossorial rodent. I originally collected data to be analysed using occupancy modelling, however, I have many more specific habitat variables that would just simply be impossible to put all into occupancy modelling. I've collected data on the presence of genus of plants, dominant vegetation, height of vegetation, soil moisture, % sand, % ground cover, (grass, forb, bare), a number of trees. I was thinking of using Principal component analysis to identify principal components, but I don't think it fits my data. Any advice on additional data analysis I can do that would be very useful or best used. Specifically to compare vegetation types between the sites with and without the rodent presence

In the Canary Islands the presence of Pluchea ovalis has been confirmed on Tenerife, where it is an invasive species, mostly in the southern side of the island. This plant is spreading very fast from its introduction in the southwest (Adeje) some years ago, and at present is occupying even some protected areas. In any case, its main habitats in the mentioned island are road edges, small gorges, borders of ponds and dams, etc., but it shows a little expansion to good preserve sites also, and for this may supposes a big threat to natural vegetation. 

When doing habitat surveys by doing vegetation registrations for a given reptile it is important to also include vegetation registration for random points, this to do habitat selection analysis.

For our survey I wish to get some feedback if my solution is a good approach.  

I already have vegetation data at locations with observations of a given reptile. It is along a "transect line", or strictly speaking it is along a dry river bed. 

Along this river bed I could create a buffer-shapefile by the use of GIS. The buffer will be the same range as for the reptile observations (i.e. range of the distance from the center of the river bed to the reptile observations). Within the buffer I will use GIS to create random points. These random points will be the places that we have to visit for registrations.

To find the points we have to use a handheld GPS, unfortunately the accuracy is +/- 5 m. So when arriving the point, we have to randomly select the location for registration.

One solution is as following when arriving the random point:

--> That we close our eyes and turn around some times and then toss something light weighted object that easily attach to branches, and we “treat” the object as a reptile and do the vegetation registration as it was a reptile observation. 

Is this a good approach? Remarks and suggestions are welcome.

In our study we verified that the reversal of plagiotropism does not guarantee the regeneration of a complete tree in grafting with a propagule obtained from the branch of a conifer (Araucaria angustifolia). Would there be the possibility of cell memory (in meristematic cells) contained in tissues used for propagation? We verified that one type of stem does not regenerate the other (trunk, branches and grimpa - secondary branch), preventing the large - scale vegetative propagation of the species.