https://padlet.com/maya_serhan/hk31lgj81wsq en-us 2019-02-28 05:43:51 UTC 2019-02-28 07:33:15 UTC hello@padlet.com maya_serhan https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336267483 Describe the biotic components of an ecosystem ]]> 2019-02-28 06:03:39 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336267483 maya_serhan https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336267553 2019-02-28 06:04:43 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336267553 maya_serhan https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336267674 2019-02-28 06:06:16 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336267674 maya_serhan https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336267697 2019-02-28 06:06:35 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336267697 maya_serhan https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336267722 2019-02-28 06:06:49 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336267722 maya_serhan https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336267763 2019-02-28 06:07:23 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336267763 maya_serhan https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336267814 2019-02-28 06:07:56 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336267814 https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336275791 Biotic factor]]> 2019-02-28 06:57:44 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336275791 https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336276613 Water -> Availability of water limits where many organisms can live. Ex: Desert organisms have adaptations for water conservation.


]]> 2019-02-28 07:02:11 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336276613 https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336276853 - The salt concentration of water in the environment affects the water balance of organisms through osmosis.
- Aquatic organisms are restricted to freshwater or salt water depending in their ability to osmoregulate.
- Most terrestrial organisms can excrete excess salts from specialized glands or in feces or urine, high-salinity habitats typically have few species of plants and animals.
- Salmons migrate between freshwater streams and the ocean to osmoregulate ( they balance their salt concentration by adjusting the amount of water they drink and by switching their gils from taking up salt in freshwater to excreting salt in the ocean.

]]> 2019-02-28 07:03:42 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336276853 https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336277113 1-predation;organisms that kill their prey
2- herbivory; organisms that eat plants or algae
* both restrict the ability of a species to survive and reproduce..
3- presence or absence of pollinators, food resources
4- parasites, pathogens and competing organsims.
* Act as biotic limitation on species distribution.


Alyazyah Salem, Noora ]]> 2019-02-28 07:05:18 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336277113 https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336277134 Water affects the oxygen availaibility, where in water there is slow diffusion of oxygen which leads to limiting the cellular respiration and other processes. Oxygen concentraion can be low deep in the ocean where organic matter is abundant. ]]> 2019-02-28 07:05:23 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336277134 https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336277324 -temperature effects biological processes 
-EX: protein of most organism denature at temperature above 45C.
-Most organisms function best within a specific range of environmental temperature 
-Temperatures outside the range may force animals to use up energy to regulate their internal temperature 
-Extraordinary adaptations enable certain organisms ( such us thermophilic prokaryote) to live outside the temperature range .

Maitha, sultana, alya]]> 2019-02-28 07:06:32 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336277324 https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336277850 Sunlight provides energy for most ecosystem , sunlight must be within the normal range in order to not cause harm to photosynthetic organisms and destroy the environment , in a very hot temperature the animal and plants will not be able to cool down and the sun rays may case a damage to DNA and proteins of organisms . If the sun light level is low the plants and aquatic organisms will not be able to absorb heat for photosynthesis ]]> 2019-02-28 07:09:45 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336277850 https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336278003 -PH levels , mineral composition and physical structure of rocks and soil will limit the distribution of plants and organsims the feed on them.

pH : can limit the distribution
1 directly : by extreme acidic or basic conditions.
2 indirectly: by affecting the solubility of toxins and nutrients 

Composition : 
The composition of rocks and soil that makes up the substrate which is the riverbed can affect the water chemistry which will influence the resident organsims.

Fresh water and marine environment: 
The structure of the subtrate in the first layer of the soil will determine wether the organsim can attach to it or burrow into it

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Amna Abd]]> 2019-02-28 07:10:46 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336278003 https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336278005 In forests, shading by leaves makes competition for light intensity, particulary for seeds growing on the forest floor. In aquatic environments most photosynthesis occurs relatively near the surface of the water , since the first meters of water absorbs more light.]]> 2019-02-28 07:10:47 UTC https://padlet.com/maya_serhan/hk31lgj81wsq/wish/336278005