{'fraction_non_alphanumeric': 0.0126953125, 'fraction_numerical': 0.0009765625, 'mean_word_length': 5.137724550898204, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Age-Specific Survivorship and Reproduction in Phlox drummondii

Complete survivorship and fecundity schedules were constructed from observations of a natural population of the winter annual Phlox drummondii. The data were collected through the complete generation of a cohort of individuals, including the dormant seed phase of the life cycle. Survivorship is shown to approach type II during the period of seed dormancy and to approach type I for the population after germination. Reproduction was found to be unevenly distributed among individuals, the majority of offspring being produced by a small fraction of the cohort. Estimates of the net reproductive rate R0 and the intrinsic rate of increase r are compared with those of other organisms. The rates are lower than those expected of colonizing or r-selected species. It is suggested that certain annual plants like P. drummondii may have acquired a shortened generation length, but lack the further demographic specialization of many annuals as fugitives or weeds.