Management Dichelostemma capitatum

-


blue dicks @ antelope valley california poppy reserve, march 2005.


indigenous people had several different types of management activities ensure future corm production @ gathering sites:



periodic digging , thinning of corms or separating cormlets, , replanting them may have enhanced plant numbers , densities. digging corms acts form of tillage, increase size of gathering tract, aerate soil, lower weed competition, , prepare seedbed increase seed germination rates. dichelostemma capitatum populations require periodic disturbance maintain , increase populations; therefore, indigenous harvesting regimes may maintain populations. populations become overcrowded , show reduced vigor can divided , separated.







Comments

Post a Comment

Popular posts from this blog

Prosodic bootstrapping Bootstrapping (linguistics)

-
1 prosodic bootstrapping 1.1 prosodic cues syntactic structure 1.2 prosodic cues clauses , phrases 1.3 criticism prosodic bootstrapping even before infants can comprehend word meaning, prosodic details assist them in discovering syntactic boundaries. prosodic bootstrapping or phonological bootstrapping investigates how prosodic information — includes stress, rhythm, intonation, pitch, pausing, dialectal features — can assist child in discovering grammatical structure of language or acquiring. in general, prosody introduces features reflect either attributes of speaker or of utterance type. speaker attributes include emotional state, presence of irony or sarcasm. utterance-level attributes used mark questions, statements, , commands, , can used mark contrast. prosodic features associated speaker: emotional state, irony, sarcasm prosodic features associate utterance type: question, statement, command, contrast similarly, in sign language, prosody includes facial expression, mouthing, , r...
Read more

Principal leitmotifs Music of The Lord of the Rings film series

-
1 principal leitmotifs 1.1 first appearance in fellowship of ring 1.2 first appearance in 2 towers 1.3 first appearance in return of king 1.4 reprised themes hobbit 1.5 themes of hobbit principal leitmotifs howard shore s composition not carry motifs on either other scores of career or passages of existing film or stage music, exception of 1 intentional nod richard wagner on end-credits of third film. shore wrote long series of interrelated leitmotifs used, developed, combined or fragmented throughout 3 scores. motifs attached places, cultures, characters, objects , occurrences. while stage , film composers deviated meaning of themes , used them romantically (i.e. suggestion of mood) shore refrains using technique. several pieces feature intriguing thematic choices choosing history of 1 ring theme passage of argonath or ringwraith theme orc armies in prologue (and again azog in hobbit) neither outright romantic in application , can explained. history of ring being main theme o...
Read more

Particle swarm optimization .28Kennedy .26 Eberhart 1995.29 List of metaphor-based metaheuristics

-
particle swarm optimization (pso) computational method optimizes problem iteratively trying improve candidate solution regard given measure of quality. solves problem having population of candidate solutions, here dubbed particles, , moving these particles around in search-space according simple mathematical formulae on particle s position , velocity. each particle s movement influenced local best known position, guided toward best known positions in search-space, updated better positions found other particles. expected move swarm toward best solutions. pso attributed kennedy, eberhart , shi , first intended simulating social behaviour, stylized representation of movement of organisms in bird flock or fish school. algorithm simplified , observed performing optimization. book kennedy , eberhart describes many philosophical aspects of pso , swarm intelligence. extensive survey of pso applications made poli. recently, comprehensive review on theoretical , experimental works on pso has bee...
Read more