Alternes 



Two or more communities alternating with each other 

 in a more or less restricted area. 



Altherbosa 



Communities with tall herbs, especially in denuded forest 

 areas. 



Altimeter 



An instrument for determining altitude, e.g., aneroid 

 barometer. 



Altricial 



Refers to the condition of delay after birth or hatching in 

 the attainment of a completely independent mode of self 

 maintenance, cf. Precocial. 



Alvar 



A vegetation type consisting of dwarf shrubs resembling 

 steppe, in Sweden. 



Alveolate 



Pitted, appearing like a honeycomb. 



Ama nthophi lous 



Refers to organisms living in sandy areas. 



Ambulatorial 



Refers to adaptations for walking in contrast to running, 

 associated with forest animals, cf. Fossorial, Scansorial. 



Amendment 



Any material such as lime or synthetic conditioners that 

 is worked into the soil to make it more productive; usually 

 restricted to materials other than fertilizers. 



Amensalism 



The state or interaction in which one organism is in- 

 hibited while the other is not influenced, cf. Commensalism. 



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