[efloraofindia:294371] Desktop Calendar for May 18

[oi...@oikos.in]

Title: oikos :: A Calender for your Desktop!

May - 2018 Dear Nature Lovers, Greetings from oikos ! On its course, a river takes with it various sediments and, along the way, sculpts them into various shapes and sizes. The shapes change between the source region and the place where it amalgamates with the sea. The river's bed and banks are continually eroded, and this adds the material (or load) to the water, which it transports downstream. The type and quantity of the sediment load depends upon the river's velocity , gradient rock type and the intensity of rainfall. Boulders, gravel and sand is dragged, rolled and bounced along the bottom of the river. This is called the bed load. Finer sand and mud that is supported by the water column is called the suspended load. Dissolved minerals and nutrients form soluble load which is an invisible load but matters a lot for life. Fast moving sections of a river can carry a lot of sediment as bed load and suspended load. However, slower sections of rivers can't, so the heavier ones are dropped first, followed by gravel and then sand and then silt. This is the reason why we see big boulders at source, coarser sediments like cobbles, gravels and sand in the plains, and sand and silt particles near the mouth of the river. Each type of sediment forms a unique habitat in the river channel. This gives rise to a diverse flora and fauna like algae, diatoms, higher plants, insects, fishes and others. An abundance of decaying matter at the river bottom promotes the growth of plankton populations, which thrive well because of the diverse sediments. It is therefore necessary to preserve the sediment diversity within a river channel. The way we use it's catchment affects the maintenance of this sediment diversity. The physical and biological elements together make up a river ecosystem. Disturbing any of them changes the river's functioning and the ecological services which mankind relies on. Regards, Ketaki & Manasi. With Team oikos ! Click on any of the desired options below to get appropriate image. Save it to computer and set it as desktop background for your computer monitor. HD wide screen (1920 * 1080 px ) Regular square screen (1024 * 768 px) Mobile screen (1836 * 3268 px) Please Note - This Email is a part of awareness campaign initiated by oikos, Pune. Write to us for your valuable feedback. oikos have been sending ‘Desktop calendars’ since January’06 with various themes, which can be downloaded from website. If you are not willing or not the correct recipient of this Email, kindly reply this mail with subject 'unsubscribe'.  Thanking you for your precious time. Spread a word !! Forward to nature lovers ! oikos for ecological services Ph. 020-25451875 Web: www.oikos.in You are subscribed to octanego as indiantreepix@googlegroups.com. If you do not wish to receive any further communications, please click here. -- You received this message because you are subscribed to the Google Groups "efloraofindia" group. To unsubscribe from this group and stop receiving emails from it, send an email to indiantreepix+unsubscr...@googlegroups.com. To post to this group, send email to indiantreepix@googlegroups.com. Visit this group at https://groups.google.com/group/indiantreepix. For more options, visit https://groups.google.com/d/optout.